RFC: GitHub Action to automate the release procedure

I’m creating a GitHub Action which automates a part of release procedure.
If you’re plugin author, please check KengoTODA/sonar-update-center-action and have a try with.

When I released findbugs plugin, sorry for my careless, I many times mistook in creating PR or announcing at here. I’m also a lazy developer maybe like you :grin:, so I’m motivated to automate this procedure to reduce cost in my work (and in sonarsource side hopefully).

Please read the README.md in the repo to grasp how it works.
I hope that this automation helps who shares similar issue with me.
If you found any problems/requests, please issue at the GitHub repo. Thanks in advance!