github: mariadb database healthcheck+naming

MariaDB's container has a healthcheck.sh script that can be used.
mysqladmin ping has flaw that it checks unix socket first which
means it can return true while the database is been bootstrapped.

Also use the MariaDB names as we haven't been MySQL for a while.

.github/workflows/databases.yml

@@ -103,14 +103,14 @@ jobs:
     runs-on: ubuntu-22.04
 
     services:
-      mysql:
+      mariadb:
         image: mariadb:10
         env:
-          MYSQL_ALLOW_EMPTY_PASSWORD: yes
-          MYSQL_DATABASE: laravel
+          MARIADB_ALLOW_EMPTY_ROOT_PASSWORD: yes
+          MARIADB_DATABASE: laravel
         ports:
           - 3306:3306
-        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+        options: --health-cmd="healthcheck.sh --connect --innodb_initialized" --health-interval=10s --health-timeout=5s --health-retries=3
 
     strategy:
       fail-fast: true