AO3-6942 update page title in admin view for spammer ban deletion user creations page to be dynamic

Author: laurasimmons30

app/controllers/admin/admin_users_controller.rb

@@ -143,6 +143,7 @@ def confirm_delete_user_creations
     @bookmarks = @user.bookmarks
     @collections = @user.sole_owned_collections
     @series = @user.series
+    @page_subtitle = t(".page_title", login: @user.login)
   end
 
   def destroy_user_creations

config/locales/views/en.yml

@@ -149,6 +149,7 @@ en:
         confirm: Are you sure? Remember this will destroy ALL these objects!
         page_heading: Delete Spammer Creations
         submit: Yes, Delete All Spammer Creations
+        page_title: "%{login} - Confirm Deletion of User Creations"
       creations:
         navigation:
           admin_user: User Administration