build(deps): Bump library/mariadb from 11.8 to 12.1

Bumps library/mariadb from 11.8 to 12.1.

---
updated-dependencies:
- dependency-name: library/mariadb
  dependency-version: '12.1'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]

compose.production.yml

@@ -17,7 +17,7 @@ services:
       - db
 
   db:
-    image: docker.io/library/mariadb:11.8
+    image: docker.io/library/mariadb:12.1
     restart: unless-stopped
     env_file: .env.production