Update BetterReflection

Author: ondrejmirtes

composer.json

@@ -23,7 +23,7 @@
 		"nette/utils": "^3.2.5",
 		"nikic/php-parser": "^4.17.1",
 		"ondram/ci-detector": "^3.4.0",
-		"ondrejmirtes/better-reflection": "6.20.0.1",
+		"ondrejmirtes/better-reflection": "6.21.0",
 		"phpstan/php-8-stubs": "0.3.82",
 		"phpstan/phpdoc-parser": "1.24.5",
 		"react/async": "^3",