fix(deployment): use correct update function

[wass3r]

fixes an issue where a failure to load deployments would update the error state of builds instead of deployments causing a error message on the builds tab before the automatic refresh loads in the builds correctly.

also limits loading to when you are on the deployments tab.

[plyr4]

LOVE IT! one thing, my previous "fix" was incorrect, I think I "fixed" the singular deployment response but you found the correct one:

ui/src/elm/Main.elm

Line 1489 in e4c97d8

( { model | repo = updateDeployments (toFailure error) rm }, addError error )

I propose we squash my previous "addFailure" and just offset this to the notification tray

                    ( model, addError error )