ansible.cfg: disable SSH host key checking

ansible.cfg

@@ -6,6 +6,11 @@ inventory=hosts
 ask_vault_pass=True
 remote_user = provisioning
 interpreter_python=auto
+# Don't warn on unknown SSH host keys because it's super annoying for new hosts
+# or if you get a new laptop and run Ansible there!
+#
+# See: https://docs.ansible.com/ansible/latest/user_guide/connection_details.html#managing-host-key-checking
+host_key_checking = False
 
 ansible_managed = This file is managed by Ansible.%n
   template: {file}