Update help command output in test

The help command output in the test file commands_aggregator/help.rs has been revised. The updated test now expects an output that starts with "Help command", aligning it with the new format changes.

module/move/wca/tests/inc/commands_aggregator/help.rs

@@ -53,7 +53,7 @@ wca = {{path = "{}"}}"#,
 
   assert_eq!
   (
-    "echo < subjects >  < properties > - prints all subjects and properties\n\nSubjects:\n\t- Subject [String] ?\nProperties:\n\tproperty - simple property [String] ?\n",
+    "Help command\n\necho < subjects > < properties > - prints all subjects and properties\n\nSubjects:\n\t- Subject [?String]\nProperties:\n\tproperty - simple property [?String]\n",
     result
   );
 }