Fix PHPStan errors

Author: vmcj

webapp/src/Controller/API/JudgehostController.php

@@ -599,7 +599,7 @@ public function addGenericTaskOutput(
             $genericTask->setOutput($genericTaskOutput);
             $this->em->persist($genericTask);
             $this->em->persist($genericTaskOutput);
-        } elseif (count($genercTasks) !== 1) {
+        } elseif (count($genericTask) !== 1) {
             throw new BadRequestHttpException("There should be only one generic task for this judgetask.");
         } else {
             $genericTask = $genericTask->first();

webapp/src/Entity/GenericTask.php

@@ -60,7 +60,7 @@ class GenericTask extends BaseApiEntity
     private string|float|null $startTime = null;
 
     /**
-     * @var Collection<int, JudgingRunOutput>
+     * @var Collection<int, GenericTaskOutput>
      *
      * We use a OneToMany instead of a OneToOne here, because otherwise this
      * relation will always be loaded. See the commit message of commit

webapp/src/Entity/JudgeTask.php

@@ -383,7 +383,7 @@ public function getJudgingRuns(): Collection
         return $this->judging_runs;
     }
 
-    public function addGenericTask(GenericTask $genericTask): GenericTask
+    public function addGenericTask(GenericTask $genericTask): JudgeTask
     {
         $this->generic_tasks[] = $genericTask;
         return $this;