Change message of public timeline for local only (mastodon#12224)

Author: ykzts

app/views/public_timelines/show.html.haml

@@ -7,7 +7,11 @@
 
 .page-header
   %h1= t('about.see_whats_happening')
-  %p= t('about.browse_public_posts')
+
+  - if Setting.show_known_fediverse_at_about_page
+    %p= t('about.browse_public_posts')
+  - else
+    %p= t('about.browse_local_posts')
 
 #mastodon-timeline{ data: { props: Oj.dump(default_props) }}
 #modal-container

config/locales/en.yml

@@ -11,6 +11,7 @@ en:
     apps: Mobile apps
     apps_platforms: Use Mastodon from iOS, Android and other platforms
     browse_directory: Browse a profile directory and filter by interests
+    browse_local_posts: Browse a live stream of public posts from this server
     browse_public_posts: Browse a live stream of public posts on Mastodon
     contact: Contact
     contact_missing: Not set