Update src/Executor/Promise/Promise.php

Co-authored-by: Benedikt Franke <benedikt@franke.tech>

Author: Warxcell

src/Executor/Promise/Promise.php

@@ -32,8 +32,8 @@ public function __construct($adoptedPromise, PromiseAdapter $adapter)
     }
 
     /**
-     * @param Closure(T):mixed $onfulfilled
-     * @param Closure(Throwable):mixed $onRejected
+     * @param (callable(TFulfilled): mixed)|null $onFulfilled
+     * @param (callable(Throwable): mixed)|null $onRejected
      * @return Promise<T>
      */
     public function then(?callable $onFulfilled = null, ?callable $onRejected = null): Promise