Set version for 2.12

Author: phw

conf.py

@@ -31,7 +31,7 @@
 project = 'MusicBrainz Picard'
 
 # The full version, including alpha/beta/rc tags (must start with a 'v' and not contain any spaces)
-version = 'v3.0rc1'
+version = 'v2.12'
 
 author = 'Bob Swift'
 # copyright = 'MusicBrainz Picard User Guide by Bob Swift is licensed under CC0 1.0. To view a copy of this license, visit https://creativecommons.org/publicdomain/zero/1.0'