Release: v2.1.11 (#501)

## What's Changed
* Update troubleshooting docs for Python by @sethvargo in
https://github.com/google-github-actions/auth/pull/488
* Add linters by @sethvargo in
https://github.com/google-github-actions/auth/pull/499
* Update deps by @sethvargo in
https://github.com/google-github-actions/auth/pull/500


**Full Changelog**:
https://github.com/google-github-actions/auth/compare/v2.1.10...v2.1.11