Fix @template annotation for Stub::makeEmptyExcept

Author: lysyjan

src/Stub.php

@@ -158,7 +158,7 @@ public static function factory($class, int $num = 1, array $params = []): array
      *      'save' => \Codeception\Stub\Expected::once()
      * ], $this);
      * ```
-     * @template
+     * @template RealInstanceType of object
      * @param class-string<RealInstanceType>|RealInstanceType|callable(): class-string<RealInstanceType> $class - A class to be mocked
      * @param string $method
      * @param array $params