Deprecated Node 20 actions

I saw the banner about Node 20 actions.. and did some research on the state of things.

There are 3 Node 20 actions used right now

- mxschmitt/action-tmate

This is a node24 version available, I have opened a PR to fix this one. #1046

- ts-graphviz/setup-graphviz

There is a [PR](https://github.com/ts-graphviz/setup-graphviz/pull/655) open for this but it has not been merged and the project hasn't had any activity in a year. Might need to move to a more manual install.

- FirebaseExtended/action-hosting-deploy

I think this is fixed now but they need to cut a new release see (https://github.com/FirebaseExtended/action-hosting-deploy/issues/457). Should be straightforward to upgrade once they do.