Update changelog

CHANGELOG.md

@@ -1,3 +1,16 @@
+# 2019-05-23
+
+## Ansible 2.8 compatibility
+
+Thanks to [@danbob](https://github.com/danbob), the playbook now [supports the new Ansible 2.8](https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/187).
+
+A manual change is required to the `inventory/hosts` file, changing the group name from `matrix-servers` to `matrix_servers` (dash to underscore).
+
+To avoid doing it manually, run this:
+- Linux: `sed -i 's/matrix-servers/matrix_servers/g' inventory/hosts`
+- Mac: `sed -i '' 's/matrix-servers/matrix_servers/g' inventory/hosts`
+
+
 # 2019-05-21
 
 ## Synapse no longer required