Update GitHub actions

[bitmold]

Recently Holmes shared this screenshot from a GitHub actions run:

In it, it shows that 3 actions have still not been updated to do their CI things in node 24 and that GitHub will soon force actions to run with nodejs24. The actions are:

• Saionaro/extract-package-version this can be trivialy updated to their new 1.4.0 release which explicitly uses node 24
• TryQuiet/base64-to-file This is Quiet's unmodified fork of https://github.com/timheuer/base64-to-file. Quiet's fork had no new commits, and there have been other fixes by the original maintainer. In the near future, there will be a release supporting node24 that Quiet can update to.. Quiet's fork of this repo should be closed
• https://github.com/actions-ecosystem/action-slack-notifier the slack action has not seen any activity in years. I could fork it to run under node 24, however it seems pretty unlikely that if it were forced to run in node24 anything will break. We can test this.

[bitmold]

@holmesworcester if it's necessary to update the slack action, all that probably needs to happen is to fork https://github.com/actions-ecosystem/action-slack-notifier and update it's action.yml file:

runs:
  using: node12
  main: dist/index.js

That action has been running with node 12, but will most likely behave the same in node 24 (it's been running fine on GitHub with node 20 already...). But again, I don't think making this change is going to be necessary....