Update importlib-metadata requirement from <8.6 to <8.7

Updates the requirements on [importlib-metadata](https://github.com/python/importlib_metadata) to permit the latest version.
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/NEWS.rst)
- [Commits](python/importlib_metadata@0.1...v8.6.1)

---
updated-dependencies:
- dependency-name: importlib-metadata
  dependency-type: direct:production
...

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

requirements.txt

@@ -67,7 +67,7 @@ pyyaml==6.0.2
 pbr>=0.11
 rich==13.9.4 # bandit
 bandit==1.8.2
-importlib-metadata<8.6 # for flake8
+importlib-metadata<8.7 # for flake8
 typing_extensions==4.12.2
 zipp==3.21.0