delete master branch, potentially turn into a tag?

[karlbrown-va]

Description: At this point https://github.com/actions/setup-node/pull/171 the master branch was changed to main. However, we still had actions pointing to master, which one would normally assume would link to the latest tip. Since master is now moribund this branch should be deleted, which will likely cause existing actions to break. Or, the branch can be deleted and a new tag can be maintained of 'master' until such time as people have migrated over to using main or v2 etc.

Action version: v2.5

Platform:

• [ ] Ubuntu
• [x ] macOS
• [ ] Windows

Runner type:

• [x ] Hosted
• [ ] Self-hosted

Tools version: n/a

Repro steps:
create an action linking to setup-node/master. Notice how it pulls in an older version.

Expected behavior: Master should link to the tip.

Actual behavior: Master is now a stale branch. So the branch should be deleted or replaced with a continuously updating tag.