Fix formatting in sendMessage function to ensure consistent code style

src/controller/chat.controller.js

@@ -467,7 +467,7 @@ module.exports = {
             sender_xid: userId,
             receiver_xid: receiverId || null,
             message: message,
-            message_type: "text"
+            message_type: "text" 
         });
         
         const io = req.app.get('io');