Rename local variable name `current_user` to `verified_user` [ci skip]

Related #28570

guides/source/action_cable_overview.md

@@ -6,7 +6,7 @@ incorporate real-time features into your Rails application.
 
 After reading this guide, you will know:
 
-* What Action Cable is and its integration on backend and frontend  
+* What Action Cable is and its integration on backend and frontend
 * How to setup Action Cable
 * How to setup channels
 * Deployment and Architecture setup for running Action Cable
@@ -64,8 +64,8 @@ module ApplicationCable
 
     private
       def find_verified_user
-        if current_user = User.find_by(id: cookies.signed[:user_id])
-          current_user
+        if verified_user = User.find_by(id: cookies.signed[:user_id])
+          verified_user
         else
           reject_unauthorized_connection
         end