fix: use nullsafe operator for project attribute retrieval in Action class

src/Appwrite/Platform/Modules/Databases/Http/Databases/Collections/Documents/Action.php

@@ -382,7 +382,7 @@ abstract class Action extends DatabasesAction
                 ->from($queueForEvents)
                 ->trigger();
 
-            if (!empty($queueForEvents->getProject()->getAttribute('webhooks', []))) {
+            if (!empty($queueForEvents->getProject()?->getAttribute('webhooks', []))) {
                 $queueForWebhooks
                     ->from($queueForEvents)
                     ->trigger();