Bump tables from 3.7.0 to 3.8.0 (#879)

Bumps [tables](https://github.com/PyTables/PyTables) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/PyTables/PyTables/releases)
- [Changelog](https://github.com/PyTables/PyTables/blob/master/RELEASE_NOTES.rst)
- [Commits](PyTables/PyTables@v3.7.0...v3.8.0)

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

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

requirements/requirements-test-optional.txt

@@ -4,5 +4,5 @@ pandas==1.5.2; implementation_name=='cpython'
 pymongo==4.3.3; implementation_name=='cpython'
 redis==4.3.5
 ruamel.yaml==0.17.21
-tables==3.7.0; implementation_name=='cpython'
+tables==3.8.0; implementation_name=='cpython'
 zarr==2.13.3; platform_system!='Windows'