Component Detection version bump reminder workflow only runs on first PR event

I noticed my PR #27 doesn't have the version bump reminder. In the logs I found:

> this action only works on pull_request events or other commits associated with a pull [^1]

Maybe this PR comment functionality would work better as a bot than a workflow. Or, we could find a different action that works on push events.

[^1]: https://github.com/microsoft/component-detection/runs/4599051926?check_suite_focus=true#step:2:13

Start with the version bump reminder workflow and the linked logs for PR #27. Determine whether it can respond to push events or whether a bot or different action is required; done means the reminder appears for PRs like #27 beyond the first pull_request event.

Written by the indexing model from the issue text.