SG-40114 Update supported version - add version 21.0 (#84)

* Update supported version - add version 21.0

* Update README.md

Co-authored-by: Copilot <[email protected]>

---------

Co-authored-by: Copilot <[email protected]>

Author: julien-lang

README.md

@@ -1,6 +1,6 @@
 # Toolkit Engine for Houdini
 
-![Supported Houdini versions: 19.5 - 20.5](https://img.shields.io/badge/Houdini-19.5_--_20.5-blue?logo=houdini&logoColor=f5f5f5 "Support Maya versions")
+![Supported Houdini versions: 19.5 - 21.0](https://img.shields.io/badge/Houdini-19.5_--_21.0-blue?logo=houdini&logoColor=f5f5f5 "Supported Houdini versions")
 [![Supported VFX Platform: 2022 - 2025](https://img.shields.io/badge/VFX_Platform-2025_|_2024_|_2023_|_2022-blue)](http://www.vfxplatform.com/ "Supported VFX Platform")
 [![Supported Python versions: 3.9 - 3.11](https://img.shields.io/badge/Python-3.11_|_3.10_|_3.9-blue?logo=python&logoColor=f5f5f5)](https://www.python.org/ "Supported Python versions")
 

engine.py

@@ -26,7 +26,7 @@
 # Houdini versions compatibility constants
 VERSION_OLDEST_COMPATIBLE = (18, 5)
 VERSION_OLDEST_SUPPORTED = (19, 5)
-VERSION_NEWEST_SUPPORTED = (20, 5)
+VERSION_NEWEST_SUPPORTED = (21, 0)
 # Caution: make sure compatibility_dialog_min_version default value in info.yml
 # is equal to VERSION_NEWEST_SUPPORTED