[Security-Guard] fixed 35203 missing name tag in param docblock

Added missing $credentials name tag to @param for getPassword()
to resolve PHPStan error and comply with the docBlock spec.

src/Symfony/Component/Security/Guard/PasswordAuthenticatedInterface.php

@@ -19,7 +19,7 @@ interface PasswordAuthenticatedInterface
     /**
      * Returns the clear-text password contained in credentials if any.
      *
-     * @param mixed The user credentials
+     * @param mixed $credentials The user credentials
      */
     public function getPassword($credentials): ?string;
 }