Bump coverage from 7.6.3 to 7.6.4

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.6.3 to 7.6.4.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.3...7.6.4)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -1,7 +1,7 @@
 azure-cosmos==4.7.0
 azure-functions==1.21.3
 azure-storage-queue==12.12.0
-coverage==7.6.3
+coverage==7.6.4
 openai==1.42.0
 pydantic==2.9.2
 pylint==3.3.1