REL-1274686: Update CHANGELOG.md

Author: zachtepper

CHANGELOG.md

@@ -2,5 +2,8 @@
 
 All notable changes to this project will be documented in this file.
 
+### 01-Apr-2026
+-[REL-1274686](https://jira.kcura.com/browse/REL-1274686) - Add RAP Builder documentation
+
 ### 03-Mar-2026
 -[REL-1238691](https://jira.kcura.com/browse/REL-1238691) - initial commit