Update Changelog.md

Changelog.md

 # Changelog
 
 All notable changes to this project will be documented in this file.
+## [1.13] - 2024-04-17
+- GAP Ansible collection version is pinned to 1.0.73
 ## [1.12] - 2024-06-17
 - GAP Ansible collection version is pinned to 1.0.72
 ## [1.11] - 2024-05-21