chore(deps): bump golang.org/x/oauth2 from 0.20.0 to 0.21.0 (#1962)

Bumps [golang.org/x/oauth2](https://github.com/golang/oauth2) from 0.20.0 to 0.21.0.
- [Commits](https://github.com/golang/oauth2/compare/v0.20.0...v0.21.0)

---
updated-dependencies:
- dependency-name: golang.org/x/oauth2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -59,7 +59,7 @@ require (
 	github.com/vulsio/goval-dictionary v0.9.5
 	go.etcd.io/bbolt v1.3.10
 	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842
-	golang.org/x/oauth2 v0.20.0
+	golang.org/x/oauth2 v0.21.0
 	golang.org/x/sync v0.7.0
 	golang.org/x/text v0.16.0
 	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028