fix(wording): fix on case

Author: Guikingone

components/messenger.rst

@@ -285,7 +285,7 @@ do is to write your own CSV receiver::
         public function get(): void
         {
             // Receive the envelope according to your transport ($yourEnvelope here),
-            // in most case, using a connection is the easiest solution.
+            // in most cases, using a connection is the easiest solution.
             
             if (null === $yourEnvelope) {
                 return [];