Make label name in label workflow configurable

[dcastil]

Background

This repository has a GitHub Action workflow https://github.com/dcastil/tailwind-merge/blob/v2.5.3/.github/workflows/label.yml (original issue) which adds the label context-v2 to issues, PRs and discussions. I use this label to categorize issues, etc. into major versions of tailwind-merge so that I know how up to date the data in them is.

In the coming months Tailwind CSS will release the new major version v4 which will probably cause a new major version for tailwind-merge as well, leading to a new label context-v3 that will be added to all new issues, PRs and discussions.

What needs to be done

I'd like to update the label.yml GitHub Action workflow so that the label name is configurable in a single place (e.g. as jobs.env.LABEL_NAME of the workflow). The label name should not be updated, I just want to prepare things to make the update simpler once I have to release a new major version of tailwind-merge.

If anyone wants to pick it up, I'm accepting PRs for this and also happy to help if needed. 😊

[dcastil]

@Pritam1211 since you built the original workflow, I also want to notify you about this in case you'd like to add this.

[github-actions[bot]]

This was addressed in release v3.0.0.