Bump train metadata.json to 11.6.1 to fix bad tag

As discussed at [1] we tagged train puppet-tripleo before the
previous metadata bump which breaks packaging. We need to re-tag
so bumping metadata again and only after it merges will bump
puppet-tripleo train again to 11.6.1 in openstack/releases.

[1] https://review.opendev.org/c/openstack/releases/+/784445/1#message-98a8c2640e195c10da9d95faf42ce90f9a9b23b8

Change-Id: I3eb0794d063e221923238b12fd89f4dd5211eaa3

metadata.json

@@ -1,6 +1,6 @@
 {
   "name": "openstack-tripleo",
-  "version": "11.6.0",
+  "version": "11.6.1",
   "author": "OpenStack Contributors",
   "summary": "Puppet module for TripleO",
   "license": "Apache-2.0",