remove deprecated OR blade comparator

Update post.blade.php

Author: MladenJanjetovic

src/resources/views/blog/post.blade.php

@@ -13,7 +13,7 @@
 		    </span>
 		@endif
 
-		<form action="blog/save/{{$post->id or 'new'}}" method="post" enctype="multipart/form-data">
+		<form action="blog/save/{{$post->id ?? 'new'}}" method="post" enctype="multipart/form-data">
 			<input type="hidden" name="_token" value="{{csrf_token()}}">
 
 			<label>Title</label>