Run modernize (#21546)

`go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...` executed.

`go generate ./...` ran afterwards to keep generated.

internal/jwt/parser_test.go

@@ -176,7 +176,6 @@ func standardClaimsToken(claims *StandardClaims) string {
 func TestParserParse(t *testing.T) {
 	// Iterate over test data set and run tests
 	for _, data := range jwtTestData {
-		data := data
 		t.Run(data.name, func(t *testing.T) {
 			// Parse the token
 			var err error