Update google-auth requirement from ~=2.26.1 to ~=2.27.0

Updates the requirements on [google-auth](https://github.com/googleapis/google-auth-library-python) to permit the latest version.
- [Release notes](https://github.com/googleapis/google-auth-library-python/releases)
- [Changelog](https://github.com/googleapis/google-auth-library-python/blob/main/CHANGELOG.md)
- [Commits](googleapis/google-auth-library-python@v2.26.1...v2.27.0)

---
updated-dependencies:
- dependency-name: google-auth
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -41,7 +41,7 @@ fastjsonschema~=2.19.0
 fonttools~=4.47.0
 future==0.18.3
 google-api-core~=2.15.0
-google-auth~=2.26.1
+google-auth~=2.27.0
 googleapis-common-protos~=1.62.0
 h5netcdf~=1.3.0
 h5py~=3.10.0