CB-459: Add LLM guidelines (#489)

* CB-459: Add LLM guidelines

Updated the guideline section to include community agreed upon LLM/’AI’ usage guidelines.

critiquebrainz/frontend/templates/index/about.html

@@ -42,8 +42,10 @@ <h3>{{ _('Guidelines') }}</h3>
  - primarily promotional or SEO content will be hidden.') }}
 </p>
 <p>
-  {{ _('No plagiarising or copying from other sources, unless you are the copyright holder.
- If you\'re not sure if you are allowed to post it, don\'t.') }}
+  {{ _('Your submissions must be your original work. Do not submit content that you do not hold
+  the copyright to, or is not your own. This includes plagiarism and primarily LLM (Large Language
+  Model) or AI generated content. You may wish to use LLM as a tool, but be aware that obviously
+  LLM generated content will be removed.’) }}
 </p>
 <p>
   {{ _('If you have had a review hidden please check the Code of Conduct and the guidelines,