Upgrade ansible-role-grafana (v13.0.2-0 -> v13.0.2-1) and use grafana_dashboard_download_urls_auto

The new role release splits grafana_dashboard_download_urls into
default/auto/custom components. Wire the playbook's automatic dashboard
list via the auto component, so users can add their own dashboards
through grafana_dashboard_download_urls_custom without clobbering it.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

group_vars/matrix_servers

@@ -5502,7 +5502,7 @@ grafana_provisioning_datasources_datasources: |
     }] if prometheus_enabled else [])
   }}
 
-grafana_dashboard_download_urls: |
+grafana_dashboard_download_urls_auto: |
   {{
     (matrix_synapse_grafana_dashboard_urls if matrix_homeserver_implementation == 'synapse' and matrix_synapse_metrics_enabled else [])
     +

requirements.yml

@@ -33,7 +33,7 @@
   version: v4.99.1-r0-2-1
   name: exim_relay
 - src: git+https://github.com/mother-of-all-self-hosting/ansible-role-grafana.git
-  version: v13.0.2-0
+  version: v13.0.2-1
   name: grafana
 - src: git+https://github.com/mother-of-all-self-hosting/ansible-role-hydrogen.git
   version: v0.5.1-5