Update

vendor/golang.org/x/oauth2/token.go

@@ -103,7 +103,7 @@ func (t *Token) WithExtra(extra any) *Token {
 }
 
 // Extra returns an extra field.
-// Extra fields are key-value pairs returned by the server as a
+// Extra fields are key-value pairs returned by the server as
 // part of the token retrieval response.
 func (t *Token) Extra(key string) any {
 	if raw, ok := t.raw.(map[string]any); ok {