build(deps): 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

@@ -20,7 +20,7 @@ pyflakes==3.2.0
 mccabe==0.7.0
 configparser==7.1.0
 pycodestyle==2.12.0
-importlib-metadata<8.6 # for flake8
+importlib-metadata<8.7 # for flake8
 typing_extensions==4.12.0
 zipp==3.21.0  # for flake8
 flake8==7.1.0