Bump google-auth from 2.20.0 to 2.21.0 (#419)

Bumps [google-auth](https://github.com/googleapis/google-auth-library-python) from 2.20.0 to 2.21.0.
- [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@v2.20.0...v2.21.0)

---
updated-dependencies:
- dependency-name: google-auth
  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>

pyproject.toml

@@ -24,7 +24,7 @@ dependencies =[
   "catboost==1.1",
   "fastparquet==2023.4.0",
   "gcsfs==2023.6.0",
-  "google-auth==2.20.0", # needed by w&b in runpod
+  "google-auth==2.21.0", # needed by w&b in runpod
   "modin==0.17.0",
   "numpy==1.23.4",
   "optuna==3.1.0",