Merge branch '6.4' into 7.0

* 6.4: Fix implicitly-required parameters minor #53524 [Messenger] [AmazonSqs] Allow `async-aws/sqs` version 2 (smoench) Fix bad merge List CS fix in .git-blame-ignore-revs Fix implicitly-required parameters List CS fix in .git-blame-ignore-revs Apply php-cs-fixer fix --rules nullable_type_declaration_for_default_null_value [Messenger][AmazonSqs] Allow async-aws/sqs version 2

Author: nicolas-grekas

Link.php

@@ -153,7 +153,7 @@ class Link implements EvolvableLinkInterface
  */
  private array $attributes = [];
 
- public function __construct(string $rel = null, string $href = '')
+ public function __construct(?string $rel = null, string $href = '')
  {
  if (null !== $rel) {
  $this->rel[$rel] = $rel;