docs: Update Boomerang Orchestrator mode link in release notes

Author: hannesrudolph

docs/update-notes/v3.15.2.md

@@ -4,7 +4,7 @@ This release updates the Boomerang Orchestrator mode, improves Mermaid diagram r
 
 ## Boomerang Orchestrator Mode
 
-*   Enhanced Orchestrator (Boomerang) mode strictly orchestrates tasks.
+*   Enhanced [Orchestrator (Boomerang) mode](/features/boomerang-tasks) strictly orchestrates tasks.
 *   No longer reads, writes, executes commands, or utilizes MCP servers; offloads these tasks to other modes.
 *   Provides more predictable and secure task automation.