Try improve patch agent instructions

Bug: 420601973
Change-Id: Ie8a2170a4d141f999cd51e5dd56027f29e4b79d5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6591361
Commit-Queue: Alex Rudenko <alexrudenko@chromium.org>
Reviewed-by: Ergün Erdoğmuş <ergunsh@chromium.org>

Author: OrKoN

front_end/models/ai_assistance/agents/PatchAgent.ts

@@ -253,6 +253,8 @@ Call the updateFiles with the list of files to be updated once you are done.
 
 CRITICAL: before searching always call listFiles first.
 CRITICAL: never call updateFiles with files that do not need updates.
+CRITICAL: ALWAYS call updateFiles instead of explaining in text what files need to be updated.
+CRITICAL: NEVER ask the user any questions.
 `;
 
     const responses = await Array.fromAsync(this.run(prompt, {selected: null, signal}));