Merge pull request #3106 from acrobat/fix-php8-null-param-deprecation…

…s-cookie-bundle

[CookieBundle] Fix php8 deprecation for passing null to stripos

src/Kunstmaan/CookieBundle/EventSubscriber/CookieBarEventSubscriber.php

@@ -76,7 +76,7 @@ public function onKernelResponse($event)
                 ))
             || 'html' !== $request->getRequestFormat()
             || !$this->cookieHelper->isGrantedForCookieBundle($request)
-            || false !== stripos($response->headers->get('Content-Disposition'), 'attachment;')
+            || false !== stripos($response->headers->get('Content-Disposition', ''), 'attachment;')
         ) {
             return;
         }