v-2022-07-18

Update instructions

Assuming your checked out version of musicbrainz-docker is v-2022-05-17-mbdb27 or later, then just run:

git fetch --tags origin && \
git checkout v-2022-07-18 && \
sudo docker-compose up --build -d

Only change

• Upgrade MusicBrainz Server to v-2022-07-18