chore(deps): Bump golang.org/x/oauth2 from 0.21.0 to 0.30.0 (#65)

Bumps [golang.org/x/oauth2](https://github.com/golang/oauth2) from 0.21.0 to 0.30.0.
- [Commits](golang/oauth2@v0.21.0...v0.30.0)

---
updated-dependencies:
- dependency-name: golang.org/x/oauth2
  dependency-version: 0.30.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -1,5 +1,5 @@
 module github.com/beatlabs/github-auth
 
-go 1.21
+go 1.23.0
 
-require golang.org/x/oauth2 v0.21.0
+require golang.org/x/oauth2 v0.30.0

go.sum

@@ -1,4 +1,2 @@
-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
-github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-golang.org/x/oauth2 v0.21.0 h1:tsimM75w1tF/uws5rbeHzIWxEqElMehnc+iW793zsZs=
-golang.org/x/oauth2 v0.21.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
+golang.org/x/oauth2 v0.30.0 h1:dnDm7JmhM45NNpd8FDDeLhK6FwqbOf4MLCM9zb1BOHI=
+golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=