Support updating existing tag ref

[erodozer]

fixes #116

Adds force_update parameter, allowing for updating the ref of an existing tag. Useful for moving tags, which some workflows prefer for managing tags that reflect latest prereleases or deployments.

I, personally, had a use-case where I wanted nightly artifact snapshots of a project to be simply tagged as "latest". This is to avoid polluting the tagging, and ease distribution. The builds themselves already report the git sha so there's no need for more specific in the github releases.

[blackjid]

I'd like to force this too

[jkremser]

it looks like the repo is no longer maintained :(

@erodozer would you be willing to release the action on your fork? This feature is crucial for the action, imho.

I guess, I can consume it directly from your gh repo as
erodozer/github-tag-action@ f6b899a1d8497fca054ba1026828cbb8496b7d9e but having a dedicated tag w/ a version would be nice (i understand you probably don't want to maintain this)

[erodozer]

@jkremser I'm probably not going to do a release since I have no intention of fully maintaining this, but I will keep this branch around until it's possibly merged. If you don't like to reference by commit sha, you can always reference by branch name erodozer/github-tag-action@fix-tag-existing

Depending on the kind of project and environment you're using the action in, such as an enterprise organization, you might want to also consider forking my branch to preserve it.