Minor doc edits

overview/contributing/jira_tickets.rst
--------------------------------------
  o Fixed a typo
  o Added an example for jira tracking and sub-ticket creation.

Change-Id: I5def3fedb5cfdbbcf0a914dd69626e968136ff44
diff --git a/VERSION b/VERSION
index e464374..c815807 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.12.6
+2.12.6-dev