FIX: use feedback_category placeholder in i18n string (discourse#25514)

https://review.discourse.org/t/71308/4

config/locales/server.en.yml

@@ -4506,7 +4506,7 @@ en:
 
       ## [Powered by You](#power)
 
-      This site is operated by your [friendly local staff](%{base_path}/about) and *you*, the community. If you have any further questions about how things should work here, open a new topic in %{feedback_category_hashtag} and let’s discuss! If there’s a critical or urgent issue that can’t be handled by a meta topic or flag, contact us via the [staff page](%{base_path}/about).
+      This site is operated by your [friendly local staff](%{base_path}/about) and *you*, the community. If you have any further questions about how things should work here, open a new topic in %{feedback_category} and let’s discuss! If there’s a critical or urgent issue that can’t be handled by a meta topic or flag, contact us via the [staff page](%{base_path}/about).
 
       <a name="tos"></a>
 

lib/seed_data/topics.rb

@@ -86,7 +86,7 @@ def topics(site_setting_names: nil, include_welcome_topics: true, include_legal_
           I18n.t(
             "guidelines_topic.body",
             base_path: Discourse.base_path,
-            feedback_category_hashtag: feedback_category_hashtag,
+            feedback_category: feedback_category_hashtag,
           ),
         category: staff_category,
         static_first_reply: true,