Spelling and use Galaxy's role names
Mention the collection ansible.posix
Remove the 'v' prefix in requirements.yml's versions
Missin keyword versions in meta/main
Update ansible-steamcmd version
Correctly indent inner block
Mention steam_home in the README
Rely on the steam_home variable from steamcmd
Improve platforms list in meta/main
Add Debian Bullseye
Remove unused bloc
Fix role_name for Galaxy
Improve markdown

Errors and warnings detected by mdl.
Github account renaming + molecule update
Update build manifests

Sync what I did with ansible-role-mysql
Fix a bad copy/paste: allow existing install to be updated
Import upload work from dod-source role
Implement the Stop source games listener