Fix D4A Config Validation checking for old variable and fix docs ref

docs/configuring-playbook-appservice-draupnir-for-all.md

@@ -45,7 +45,7 @@ Add the following configuration to your `inventory/host_vars/matrix.example.com/
 ```yaml
 matrix_appservice_draupnir_for_all_enabled: true
 
-matrix_appservice_draupnir_for_all_master_control_room_alias: "MANAGEMENT_ROOM_ALIAS_HERE"
+matrix_appservice_draupnir_for_all_config_adminRoom: "MANAGEMENT_ROOM_ALIAS_HERE"
 ```
 
 ### Extending the configuration

roles/custom/matrix-appservice-draupnir-for-all/tasks/validate_config.yml

@@ -11,7 +11,7 @@
   ansible.builtin.fail:
     msg: "The `{{ item }}` variable must be defined and have a non-null value."
   with_items:
-    - "matrix_appservice_draupnir_for_all_master_control_room_alias"
+    - "matrix_appservice_draupnir_for_all_config_adminRoom"
     - "matrix_bot_draupnir_container_network"
   when: "vars[item] == '' or vars[item] is none"