Update node version

[kavyanekkalapu]

Update node version to 16

Issue:ManageIQ/manageiq-ui-classic#7930

[kavyanekkalapu]

@miq-bot assign @Fryguy
@miq-bot add_reviewer @Fryguy
@miq-bot add-label dependencies

[Fryguy]

@agrare I'm not sure how this will play on morphy, where it's still 12, but the plan is for this node 16 stuff to go to najdorf as well.

Also, I think we need to release a bumped version of the gem with this.

[agrare]

@Fryguy I think we need to get to something like this #87 where we are better at parsing info out of github actions, and we let the workflow define the node version. That PR doesn't do that specifically but moves further in that direction rather than just relying on pre-defined named jobs and language defaults.