Update changelog

CHANGELOG.md

@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [1.136.0] - Not released
+  ### Changed
+  - The advanced search form is refactored to support the new search operators.
+  ### Added
+  - When user presses '/' or 'Ctrl+K' hotkeys, the search input form in the
+    header is focused.
+  - This form now has an "Advanced search options" button that redirects to the
+    advanced search form.
 
 ## [1.135.3] - 2024-10-22
 ### Fixed