Fix serialization of followers/following counts when user hides their network (#16418)

* Add tests

* Fix serialization of followers/following counts when user hides their network

Fixes #16382

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/controllers/follower_accounts_controller.rb

@@ -85,7 +85,7 @@ class FollowerAccountsController < ApplicationController
     if page_requested? || !@account.user_hides_network?
       # Return all fields
     else
-      %i(id type totalItems)
+      %i(id type total_items)
     end
   end
 end

app/controllers/following_accounts_controller.rb

@@ -85,7 +85,7 @@ class FollowingAccountsController < ApplicationController
     if page_requested? || !@account.user_hides_network?
       # Return all fields
     else
-      %i(id type totalItems)
+      %i(id type total_items)
     end
   end
 end