feat: rename ansible hosts groups to controllers and workers

Signed-off-by: Devin Buhl <devin@buhl.casa>

bootstrap/templates/ansible/inventory/hosts.yaml.j2

@@ -1,7 +1,7 @@
 ---
 kubernetes:
   children:
-    master:
+    controllers:
       hosts:
         {% for item in nodes.inventory %}
         {% if item.controller %}
@@ -11,7 +11,7 @@ kubernetes:
         {% endif %}
         {% endfor %}
     {% if nodes.inventory | selectattr('controller', 'equalto', False) | list | length %}
-    worker:
+    workers:
       hosts:
         {% for item in nodes.inventory %}
         {% if not item.controller %}