release: post tasks for release 2.1.0 (ansible-collections#239)

- update galaxy.yml

Author: thinkdoggie

galaxy.yml

@@ -1,6 +1,6 @@
 namespace: community
 name: libvirt
-version: 2.1.0
+version: 2.1.1
 readme: README.md
 authors:
   - Ansible (https://github.com/ansible)