Merge any `docs` branch updates into hotfix branch

and also separate the 3 doc release/test phases to where I /think/
they're intended to go

I think that by merging any docs update release changes
into the hotfix branch, the rest of the release process is simplified.

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Now I understand: `origin/docs` = `origin/release` + docs cherry-picks. So it should be safe to merge `origin/docs` into release: that will result in simply pulling in those cherry-picks instead of redoing it by hand.