Update .drone.yml

Co-authored-by: Joas Schilling <213943+nickvergessen@users.noreply.github.com>

.drone.yml

@@ -287,7 +287,7 @@ steps:
   image: ghcr.io/nextcloud/continuous-integration-alpine-git:latest
   commands:
     - git submodule update --init
-- name: mariadb10.4-php7.4
+- name: mariadb10.2-php7.4
   image: ghcr.io/nextcloud/continuous-integration-integration-php7.4:latest
   commands:
     - bash tests/drone-run-php-tests.sh || exit 0