update feature request template for ext.pages

Author: krittick

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -17,7 +17,7 @@ body:
         - The core library
         - discord.ext.commands
         - discord.ext.tasks
-        - discord.ext.menus
+        - discord.ext.pages
         - The documentation
     validations:
       required: true