Update release notes for v3.6.0

Author: engswee

docs/release-notes.md

@@ -1,5 +1,15 @@
 # Release Notes
 
+## 3.6.0 (Released 25 June 2025)
+
+---
+
+- 🔥🔥 Hot new feature 🔥🔥 - _FlashPipe_ now supports syncing of API Products from **API Management** 
+  - New `sync apiproduct` command
+- Rename of `sync apim` command to `sync apiproxy` for handling API Proxies.
+  - `sync apim` still works for backward compatibility
+- Update to latest Go version 1.24.4 and dependencies
+
 ## 3.5.1 (Released 9 May 2025)
 
 ---