Update outdated 'release' property in 'conf.py' in the docs.

Author: Nusiq

docs/conf.py

@@ -9,7 +9,7 @@
 project = 'mcblend'
 copyright = '2022, Nusiq'
 author = 'Nusiq'
-release = '11.1.0'
+release = '12.0.0'
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration