chore(deps): update docker.io/library/mariadb docker tag to v12.1.2 (#1581)

* chore(deps): update docker.io/library/mariadb docker tag to v12.1.2

* chore: sync template versions with image updates

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

library/compose/mariadb/compose.yaml.j2

@@ -2,7 +2,7 @@
 ---
 services:
   {{ service_name }}:
-    image: docker.io/library/mariadb:12.0.2
+    image: docker.io/library/mariadb:12.1.2
     restart: {{ restart_policy }}
     environment:
       - MARIADB_ROOT_PASSWORD=${MARIADB_ROOT_PASSWORD}