[rb][bidi] fix: response_completed name

Author: TamsilAmani

rb/lib/selenium/webdriver/bidi/network_inspector.rb

@@ -49,7 +49,7 @@ def response_started(&block)
         end
 
         def response_completed(&block)
-          on(:response_started, &block)
+          on(:response_completed, &block)
         end
 
         private