Feature Request: Cleanup key in post

[jsg2021]

It would be nice to delete the .ssh directory in the post process life cycle:
https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#runs-for-javascript-actions

example:

runs:
  using: "node12"
  main: "lib/main.js"
  post: "lib/cleanup.js"