Bump importlib-metadata from 6.6.0 to 6.8.0 in /requirements (#1089)

Bumps [importlib-metadata](https://github.com/python/importlib_metadata) from 6.6.0 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@v6.6.0...v6.8.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements/requirements_install.txt

@@ -1,5 +1,5 @@
 ansys-dpf-gate==0.3.1
-importlib-metadata==6.6.0
+importlib-metadata==6.8.0
 numpy==1.24.1
 packaging==23.0
 psutil==5.9.4