feat(i18n): update Czech translations [skip ci]

Currently translated at 44.6% (109 of 244 strings)

Co-authored-by: Ondráš <ondrmox@gmail.com>
Translate-URL: https://hosted.weblate.org/projects/discord-tickets/bot/cs/
Translation: Discord Tickets/Bot

src/i18n/cs.yml

@@ -146,6 +146,10 @@ commands:
             name: Uzavřené tickety
           open:
             name: Otevřít tickety
+      not_staff:
+        title: ❌ Chyba
+    topic:
+      name: téma
 buttons:
   accept_close_request:
     emoji: ✅