docs: telemetry.enabled in config.sample.php (#41283)

* docs: Document the system config variable telemetry.enabled in config.sample.php

* docs: small text fixes

* docs: trailing whitespace is flagged as bad style.

---------

Co-authored-by: mmattel <[email protected]>

Author: jnweiger

config/config.sample.php

@@ -1882,4 +1882,15 @@
  * This could happen in earlier versions of the openidconnect app when using the web UI.
  */
 'loginPolicy.groupLoginPolicy.forbidMap' => [],
+
+/**
+ * Enable Sending Telemetry Reports
+ * Telemetry data is a subset of the config report as produced by the command `occ configreport:generate`.
+ *
+ * * If set to true, a daily telemetry report is sent to https://telemetry.owncloud.com/oc10-telemetry
+ * * If set to false, no telemetry reports are sent.
+ *
+ * Default: true
+ */
+'telemetry.enabled' => true,
 ];