chore(deps): bump mariadb docker tag to v12

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/phpunit.yml

@@ -102,7 +102,7 @@ jobs:
 
     services:
       mysql:
-        image: mariadb:10.11
+        image: mariadb:12.0
         ports:
           - 4444:3306/tcp
         env: