build(deps): bump golang.org/x/oauth2

Bumps [golang.org/x/oauth2](https://github.com/golang/oauth2) from 0.20.0 to 0.21.0.
- [Commits](golang/oauth2@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] <[email protected]>

Author: dependabot[bot]

scripts/gen_github_action_config/go.mod

@@ -4,7 +4,7 @@ go 1.21
 
 require (
 	github.com/shurcooL/githubv4 v0.0.0-20240120211514-18a1ae0e79dc
-	golang.org/x/oauth2 v0.20.0
+	golang.org/x/oauth2 v0.21.0
 )
 
 require github.com/shurcooL/graphql v0.0.0-20230722043721-ed46e5a46466 // indirect