feat: tweak language guidance prompt

Author: quitrk

skynet/modules/ttt/summaries/prompts/common.py

@@ -8,4 +8,4 @@ def set_response_language(locale: Locale) -> str:
     if not locale:
         return stick_to_main_language
 
-    return f'Respond in {locale.name.lower()}.'
+    return f'Make sure that you respond in {locale.name.lower()}.'