Set deploy status on pull request

[privatenumber]

When using this action on a PR hook, I would like for it to update the banner in the PR to say that it has been deployed.

Currently, it says "This branch has not been deployed":

Seems like the deploy status can be set by sending a deployment event:
https://docs.github.com/en/rest/reference/repos#deployments

For reference, nwtgck/actions-netlify does this:
https://github.com/nwtgck/actions-netlify/blob/bda6b2e6da6fdf666e0accd8873922698c37974d/src/main.ts#L42

[JamesIves]

I like the idea of this. Would this be something you're willing to open a PR for?