Upgrade

[empx92]

Hello i don't really get to know how to update my Installation in docker.

kimai:
image: kimai/kimai2:apache-latest
container_name: kimai-app
restart: unless-stopped
hostname: kimai
environment:
- APP_ENV=prod
- TRUSTED_HOSTS=192.168.99.170,localhost,${HOSTNAME}
- ADMINMAIL=admin@mail.com
- ADMINPASS=${KIMAI_ADMIN_PASSWORD}
- DATABASE_URL=mysql://kimai:${MARIADB_PASSWORD}@mariadb/kimai
volumes:
- ./kimai_var:/opt/kimai/var
- ./kimai_img:/opt/kimai/img
- ./kimai_public:/opt/kimai/public
ports:
- '1234:8001'
depends_on:
- mariadb
networks:
- npm-nw
- kimai

In the docs its called "just change the tag" but i don't know how to change the tag... could you please help me?
Best regards