Bump importlib-metadata from 6.7.0 to 6.8.0

Bumps [importlib-metadata](https://github.com/python/importlib_metadata) from 6.7.0 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@v6.7.0...v6.8.0)

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

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

requirements.txt

@@ -9,7 +9,7 @@ dill==0.3.6
 Flask==2.3.2
 gunicorn==21.2.0
 idna==3.4
-importlib-metadata==6.7.0
+importlib-metadata==6.8.0
 isort==5.12.0
 itsdangerous==2.1.2
 Jinja2==3.1.2