chore(coverage): bump from 81 to 81.5 (#1479)

**Issue number:** N/A

### PR Type

**What kind of change does this PR introduce?**
* [ ] Feature
* [ ] Bug Fix
* [ ] Refactoring (no functional or API changes)
* [ ] Documentation Update
* [x] Maintenance (dependency updates, CI, etc.)

## Summary

### Changes

Bump minimum coverage from 81 to 81.5.

### User experience

N/A

## Checklist

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* [x] I have performed a self-review of this change according to the
[development
guidelines](https://splunk.github.io/addonfactory-ucc-generator/contributing/#development-guidelines)
* [ ] Tests have been added/modified to cover the changes [(testing
doc)](https://splunk.github.io/addonfactory-ucc-generator/contributing/#build-and-test)
* [ ] Changes are documented
* [x] PR title and description follows the [contributing
principles](https://splunk.github.io/addonfactory-ucc-generator/contributing/#pull-requests)

.coveragerc

@@ -6,4 +6,4 @@ omit =
     splunk_add_on_ucc_framework/templates/input.module-template
 
 [report]
-fail_under = 81
+fail_under = 81.5