Remove alpha from the release of the manual it is way better quality than that

source/conf.py

@@ -43,7 +43,7 @@ author = u'Lubuntu Team'
 # The short X.Y version.
 version = u'18.10'
 # The full version, including alpha/beta/rc tags.
-release = u'18.10 Alpha'
+release = u'18.10'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.