chore(docs): update cloudevents comparison (#55)

dev-context/async/comparison-cef-cloudevents.md

@@ -34,7 +34,7 @@ Currently, most events are encoded using CEF. Therefore, this article focuses on
 | type and version        | [type](https://api.otto.de/portal/guidelines/r200009)                                                                    | yes                                                   | Type must follow name schema defined in our guideline [MUST follow naming scheme for type context attribute](https://api.otto.de/portal/guidelines/r200009). Version must be part of the type within OTTO.                                                                                                                                                                                                                                                                                                                 |
 | context and sequenceKey | part of [source](https://api.otto.de/portal/guidelines/r200010)                                                          | yes                                                   | source may contain more context information such as the event source. If a sequenceKey exists in CEF, it should be included in the `source` context attribute. See "sequenceNumber" for more information on how to convert the sequence attributes to CloudEvents.                                                                                                                                                                                                                                                         |
 | eventTime               | [time](https://api.otto.de/portal/guidelines/r200011)                                                                    | yes                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
-| traceId and spanId      | [traceparent](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/extensions/distributed-tracing.md#traceparent) | yes                                                   | trace_parent is defined in the [distributed tracing](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/extensions/distributed-tracing.md) extension. Follows the W3C trace context specification. The trace_parent context attribute contains the traceId as [trace-id segment](https://www.w3.org/TR/trace-context/#trace-id) and the spanId as [parent-id segment](https://www.w3.org/TR/trace-context/#parent-id). TL;DR `traceparent`= `00-<traceId (without the "-")>-<spanId>-00`                    |
+| traceId and spanId      | [traceparent](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/extensions/distributed-tracing.md#traceparent) | yes                                                   | trace_parent is defined in the [distributed tracing](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/extensions/distributed-tracing.md) extension. Follows the W3C trace context specification. The trace_parent context attribute contains the traceId as [trace-id segment](https://www.w3.org/TR/trace-context/#trace-id) and the spanId as [parent-id segment](https://www.w3.org/TR/trace-context/#parent-id). TL;DR `traceparent`= `00-<traceId (without the "-")>-<spanId>-00`. spanId must be set(value different than only 0). In cloud events trace_parent for now is optional. |
 | sequenceNumber          | [sequence](https://api.otto.de/portal/guidelines/r200003)                                                                | yes                                                   | sequence just contains a string. The semantics of this string is either defined by an out-of-band communication or by an additional [sequencetype](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/extensions/sequence.md#sequencetype) context attribute. The predefined [Integer](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/extensions/sequence.md#integer) sequencetype defines the same semantics as `sequenceNumber` in CEF if the `source` context attribute contains the `sequenceKey`. |
 | test                    | n/a                                                                                                                      | yes                                                   | not defined within the CloudEvents spec, may be added by Otto with a custom extension.                                                                                                                                                                                                                                                                                                                                                                                                                                     |
 | `{"data": {...} }`      | `{ ... }`                                                                                                                | yes                                                   | The "`data`" node is obsolete with CloudEvents. The payload starts at the beginning.                                                                                                                                                                                                                                                                                                                                                                                                                                         |