Add missing command to compile GetText files

doc/update/9.4-to-9.5.md

@@ -295,6 +295,10 @@ sudo -u git -H bundle clean
 # Run database migrations
 sudo -u git -H bundle exec rake db:migrate RAILS_ENV=production
 
+# Compile GetText PO files
+
+sudo -u git -H bundle exec rake gettext:compile RAILS_ENV=production
+
 # Update node dependencies and recompile assets
 sudo -u git -H bundle exec rake yarn:install gitlab:assets:clean gitlab:assets:compile RAILS_ENV=production NODE_ENV=production