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

[Sebastien Bacher]

I don't know my way around RTD but can't find the action (maybe I just don't have the needed acl), I will try to ping people who I think have access tomorrow
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https://code.launchpad.net/~racb/ubuntu-governance-docs/+git/ubuntu-governance-docs/+merge/487297
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