Upgrading is fairly straightforward.

https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/master/docs/maintenance-upgrading-services.md

cd into the git directory and run

git pull

That will download any new files.

Run the ansible command, you can have it ask you for the password to use.

ansible-playbook -i inventory/hosts setup.yml --tags=setup-all --ask-pass --ask-become-pass

It should give you a report if anything failed.