chore(deps): Bump golang.org/x/oauth2 from 0.30.0 to 0.31.0 (#68)

Bumps [golang.org/x/oauth2](https://github.com/golang/oauth2) from 0.30.0 to 0.31.0.
- [Commits](golang/oauth2@v0.30.0...v0.31.0)

---
updated-dependencies:
- dependency-name: golang.org/x/oauth2
  dependency-version: 0.31.0
  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>
Co-authored-by: Sotirios Mantziaris <smantziaris@gmail.com>

Author: dependabot[bot]

go.mod

@@ -1,5 +1,5 @@
 module github.com/beatlabs/github-auth
 
-go 1.23.0
+go 1.24.0
 
-require golang.org/x/oauth2 v0.30.0
+require golang.org/x/oauth2 v0.31.0

go.sum

@@ -1,2 +1,2 @@
-golang.org/x/oauth2 v0.30.0 h1:dnDm7JmhM45NNpd8FDDeLhK6FwqbOf4MLCM9zb1BOHI=
-golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=
+golang.org/x/oauth2 v0.31.0 h1:8Fq0yVZLh4j4YA47vHKFTa9Ew5XIrCP8LC6UeNZnLxo=
+golang.org/x/oauth2 v0.31.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA=