Replace live image URLs with example.com URLs

Author: jeromegamez

docs/cloud-messaging.rst

@@ -280,7 +280,7 @@ are both optional.
 
     $title = 'My Notification Title';
     $body = 'My Notification Body';
-    $imageUrl = 'https://picsum.photos/400/200';
+    $imageUrl = 'https://example.com/image.jpg';
 
     $notification = Notification::fromArray([
         'title' => $title,
@@ -293,7 +293,7 @@ are both optional.
     $changedNotification = $notification
         ->withTitle('Changed title')
         ->withBody('Changed body')
-        ->withImageUrl('https://picsum.photos/200/400');
+        ->withImageUrl('https://example.com/image.jpg');
 
 Once you have created a message with one of the methods described below,
 you can attach the notification to it: