Update webhooks.php

app/workers/webhooks.php

@@ -18,7 +18,7 @@ class WebhooksV1
 {
     public $args = [];
 
-    public function setUp()
+    public function setUp(): void
     {
     }
 
@@ -106,7 +106,7 @@ class WebhooksV1
         }
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
         // ... Remove environment for this job
     }