CircleCI Workflow update to GitHub Actions

[vsoch]

Hi USRSE! The repository here is deploying via my bot's token, and I can no longer provide this and want to suggest you update to perform the push in GitHub actions. Don't worry - I already wrote the workflow: https://github.com/hpc-social/blog/blob/main/.github/workflows/update-posts.yaml just need someone to add it here. I'll revoke my bot permissions at the end of the week, but let me know if you need more time. Thanks!

[christophernhill]

@vsoch sounds good. Thanks for the heads up, and for the awesome update-posts.yaml all ready to go.
I can try this out later today, so end of week should be fine. Thanks, hope all is well - Chris.

[vsoch]

Thank you @christophernhill !

[vsoch]

Closed with #39 thank you!