Update docker-compose.yml (#1443)
Update docker-compose.yml (#1443)

* Pin MariaDB to 10.4.12 in `docker-compose.yml`
LosFuzzys/CTFd,ajvpot/CTFd,LosFuzzys/CTFd,CTFd/CTFd,isislab/CTFd,CTFd/CTFd,ajvpot/CTFd,CTFd/CTFd,ajvpot/CTFd,LosFuzzys/CTFd,LosFuzzys/CTFd,CTFd/CTFd,isislab/CTFd,ajvpot/CTFd,isislab/CTFd,isislab/CTFd