Merge branch '5.4' into 6.0

* 5.4:
  fixed a typo in the upgrade guide
  [Mime] Update mime types
  [Security] Avoid extra warning when preloading file when EL is not installed
  [PasswordHasher] Fix documentation link
  [HttpKernel] Backport type declaration fixes
  Run PHP 8.1 CI with all extensions

Author: derrabus

README.md

@@ -33,7 +33,7 @@ $passwordHasher->verify($hash, 'plain'); // returns true (valid)
 Resources
 ---------
 
- * [Documentation](https://symfony.com/doc/current/password-hasher.html)
+ * [Documentation](https://symfony.com/doc/current/security.html#c-hashing-passwords)
  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
  * [Report issues](https://github.com/symfony/symfony/issues) and
    [send Pull Requests](https://github.com/symfony/symfony/pulls)