Update golang.org/x/oauth2 commit hash to 6b3c2da (#60)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

go.mod

@@ -4,8 +4,8 @@ require (
 	github.com/google/go-cmp v0.5.2
 	github.com/int128/listener v1.1.0
 	github.com/pkg/browser v0.0.0-20210911075715-681adbf594b8
-	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
-	golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a
+	golang.org/x/oauth2 v0.0.0-20211005180243-6b3c2da341f1
+	golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208
 )
 
 go 1.13