Bump importlib-metadata from 5.0.0 to 6.8.0

Bumps [importlib-metadata](https://github.com/python/importlib_metadata) from 5.0.0 to 6.8.0.
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/NEWS.rst)
- [Commits](python/importlib_metadata@v5.0.0...v6.8.0)

---
updated-dependencies:
- dependency-name: importlib-metadata
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/requirements_docs.txt

@@ -25,7 +25,7 @@ fsspec==2022.10.0
 gitdb==4.0.9 
 gitpython==3.1.29 
 h5py==3.7.0 
-importlib-metadata==5.0.0 
+importlib-metadata==6.8.0 
 iteration_utilities==0.11.0 
 joblib==1.2.0 
 jsonschema==4.16.0