Send message in PR when merging would create release

[jonathan-mayer]

Issue

Currently if someone isn't careful when reviewing a PR the workflows could automatically create an unwanted Release.

Problem to solve

We need a way of easily being warned when merging a PR would result in a new Release

Further details

Depends on #42

Proposal

Create a Workflow or adjust the check_version workflow to check if merging the PR would result in a new release.

It's important that even if the change was made after the PR opened (by committing a Chart.yaml version bump after opening the PR) the message still has to be sent.

It would be even better if the maintainer had to accept these risks before being able to merge. eg. a manually triggered pipeline that has to complete before merging is allowed, or by commenting or reacting with an emoji to the message.

Who can address the issue

Other links/references