Update docker.io/library/mariadb Docker tag to v12

As Ansible Galaxy is currently down, switch to using the repos directly.
This avoids reliancy on Ansible Galaxy in the future as well.

requirements.yml

@@ -1,11 +1,17 @@
 collections:
-  # Install a collection from Ansible Galaxy.
-  - name: debops.debops
-    version: ">=3.1.0"
-    source: https://galaxy.ansible.com
-  - name: community.sops
-    version: ">=2.2.4"
-    source: https://galaxy.ansible.com
-  - name: community.docker
-    version: ">=5.0.0"
-    source: https://galaxy.ansible.com
+  # debops.debops
+  - source: https://github.com/debops/debops
+    type: git
+    version: "v3.2.5"
+  # community.sops
+  - source: https://github.com/ansible-collections/community.sops
+    type: git
+    version: "2.2.7"
+  # community.docker
+  - source: https://github.com/ansible-collections/community.docker
+    type: git
+    version: "5.0.5"
+  # grafana.grafana
+  - source: https://github.com/grafana/grafana-ansible-collection
+    type: git
+    version: "6.0.6"

resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2

@@ -3,7 +3,7 @@
 
 services:
   database:
-    image: docker.io/library/mariadb:11
+    image: docker.io/library/mariadb:12
     environment:
       - "MARIADB_DATABASE=wordpress"
       - "MARIADB_ROOT_PASSWORD={{ secret__mariadb_root_password }}"