add context on search methods

Author: mayankshouche

chat.mdx

@@ -24,6 +24,8 @@ The AI Chat feature, embedded in the search bar, allows end-users to get help vi
 
 AI Chat uses only the content published on your docs as its knowledge base. We designed it to use your documentation as the single source of truth and avoid hallucinating answers that are not supported by your content.
 
+User queries are matched against the contents of your documentation for both semantic & full-text matches, which are then provided as context to a LLM.
+
 It also takes into account the end-user's selected version and language and filters the sources it uses as context based on these factors.
 
 ## Optimizing Your Content for AI Chat