Added BACnetStack version to CHANGELOG

Added BACnetStack version to CHANGELOG

Author: Kaiserchen85

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Updated preprocessor macro to include ENABLE_DATA_LINK_LAYER_IPV4
 - Updated Windows SDK version [Issues/35](https://github.com/chipkin/BACnetServerExampleCPP/issues/35)
 - Updated the project files for the CASBACnetStack to the latest version [Issues/37](https://github.com/chipkin/BACnetServerExampleCPP/issues/37)
+- Tested using BACnetStack version 4.1.19.0
 
 ### 0.0.7 (2022-Aug-11)