build(deps): bump google-cloud-storage from 1.39.0 to 1.40.0 (#6261)

Bumps [google-cloud-storage](https://github.com/googleapis/python-storage) from 1.39.0 to 1.40.0.
- [Release notes](https://github.com/googleapis/python-storage/releases)
- [Changelog](https://github.com/googleapis/python-storage/blob/master/CHANGELOG.md)
- [Commits](googleapis/python-storage@v1.39.0...v1.40.0)

---
updated-dependencies:
- dependency-name: google-cloud-storage
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

test_requirements.txt

@@ -20,7 +20,7 @@ wsgidav==3.1.0
 crc32c==2.2.post0
 xmltodict==0.12.0
 google-compute-engine==2.8.13
-google-cloud-storage==1.39.0
+google-cloud-storage==1.40.0
 
 urllib3==1.26.6