Make documentation deploy deploy to proper branch

[gracjan]

Currently manual-deploy.sh updates only latest from master.

It should update lastet from master and any XX.YY from branch-XX.YY.

Currently the problem is visible because manual in branches claims different version than it should.

BTW. Manuals for older versions cannot be found because they are not linked from anywhere. Sad.

[gracjan]

Works for 13.16, 13.18, 13.20 and latest.