fix: avoid invalid filename when generating ics download

src/Controller/Teamer/Disposition/IcsController.php

@@ -11,6 +11,7 @@ use Symfony\Component\HttpFoundation\HeaderUtils;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Attribute\Route;
 use Symfony\Component\Security\Http\Attribute\IsGranted;
+use Symfony\Component\String\Slugger\AsciiSlugger;
 
 class IcsController extends AbstractController
 {
@@ -36,7 +37,13 @@ class IcsController extends AbstractController
             $assignment->getEffectivePeriod()->start->format('d.m.Y'),
             $assignment->getEffectivePeriod()->end->format('d.m.Y')
         );
-        $contentDisposition = HeaderUtils::makeDisposition(HeaderUtils::DISPOSITION_INLINE, $filename, md5($filename));
+        $slugger = new AsciiSlugger();
+        $filename = $slugger->slug($filename);
+        $contentDisposition = HeaderUtils::makeDisposition(
+            HeaderUtils::DISPOSITION_INLINE,
+            $filename,
+            md5($filename)
+        );
 
         $response = new Response($ics);
         $response->setPrivate();