Fix flaky AppFactoryTest by isolating testDetermineResponseFactoryThrowsRuntimeException

Author: thinkliveid

tests/Factory/AppFactoryTest.php

@@ -113,6 +113,7 @@ public function testDetermineResponseFactoryThrowsRuntimeExceptionIfDecoratedNot
     /**
      * @runInSeparateProcess - Psr17FactoryProvider::setFactories breaks other tests
      */
+    #[\PHPUnit\Framework\Attributes\RunInSeparateProcess]
     public function testDetermineResponseFactoryThrowsRuntimeException()
     {
         $this->expectException(RuntimeException::class);