Fix incorrect singular version of some translation strings (#17124)

Fixes #17120

Co-authored-by: Mélanie Chauvel <perso@hack-libre.org>

Co-authored-by: Mélanie Chauvel <perso@hack-libre.org>

config/locales/en.yml

@@ -377,13 +377,13 @@ en:
       new_users: new users
       opened_reports: reports opened
       pending_reports_html:
-        one: "<strong>1</strong> pending reports"
+        one: "<strong>1</strong> pending report"
         other: "<strong>%{count}</strong> pending reports"
       pending_tags_html:
-        one: "<strong>1</strong> pending hashtags"
+        one: "<strong>1</strong> pending hashtag"
         other: "<strong>%{count}</strong> pending hashtags"
       pending_users_html:
-        one: "<strong>1</strong> pending users"
+        one: "<strong>1</strong> pending user"
         other: "<strong>%{count}</strong> pending users"
       resolved_reports: reports resolved
       software: Software