6.6 release fix (#11353)

Author: stevenwinship

doc/sphinx-guides/source/conf.py

@@ -68,9 +68,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '6.5'
+version = '6.6'
 # The full version, including alpha/beta/rc tags.
-release = '6.5'
+release = '6.6'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.