Set SSH Known Host Scan to include all managers (#14)

* Version bump

* Update SSH keyscan to use 'swarm_managers' group for improved environment consistency

Author: jaydrogers

galaxy.yml

@@ -1,7 +1,7 @@
 ---
 namespace: serversideup
 name: spin
-version: 2.1.1
+version: 2.1.2
 readme: README.md
 authors:
   - Jay Rogers (https://x.com/jaydrogers)

playbooks/prepare_ci_environment.yml

@@ -62,9 +62,9 @@
 
     - name: Run ssh-keyscan on manager hosts.
       ansible.builtin.shell: >-
-        ssh-keyscan -p {{ ssh_port }} {{ groups[spin_environment + '_managers'] | join(' ') }} | sort
+        ssh-keyscan -p {{ ssh_port }} {{ groups['swarm_managers'] | join(' ') }} | sort
       register: keyscan_result
-      when: groups[spin_environment + '_managers'] is defined and groups[spin_environment + '_managers'] | length > 0
+      when: groups['swarm_managers'] is defined and groups['swarm_managers'] | length > 0
       changed_when: false
 
     - name: Write SSH_REMOTE_KNOWN_HOSTS file