docs/sphinx: Bump major OBS version

docs/sphinx/conf.py

@@ -57,9 +57,9 @@ author = 'Hugh Bailey'
 # built documents.
 #
 # The short X.Y version.
-version = '20.1.0'
+version = '25.0.0'
 # The full version, including alpha/beta/rc tags.
-release = '20.1.0'
+release = '25.0.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.