[Merge] ~racb/ubuntu-governance-docs:add-dmb-selection-process-policy into ubuntu-governance-docs:main

[Robie Basak]

I've merged this but someone at Canonical will need to trigger a rebuild via RTD, if you could please? From here I think: https://app.readthedocs.com/projects/canonical-ubuntu-governance-docs/
-- 
https://code.launchpad.net/~racb/ubuntu-governance-docs/+git/ubuntu-governance-docs/+merge/487297
Your team Ubuntu Technical Board is subscribed to branch ubuntu-governance-docs:main.