Add Arm64 as valid prebuilt container architecture for Draupnir

group_vars/matrix_servers

@@ -2000,7 +2000,7 @@ matrix_bot_mjolnir_systemd_required_services_list: |
 # We don't enable bots by default.
 matrix_bot_draupnir_enabled: false
 
-matrix_bot_draupnir_container_image_self_build: "{{ matrix_architecture != 'amd64' }}"
+matrix_bot_draupnir_container_image_self_build: "{{ matrix_architecture not in ['amd64', 'arm64'] }}"
 
 matrix_bot_draupnir_systemd_required_services_list: |
   {{