title: I can't get GitVersion to bump versions
body: <p>I'm converting my project from Azure DevOps to GitHub Actions.
  I use GitVersion to auto version my builds.</p>
  <p>I use GitVersion Mainline mode, and I typically commit with a comment including e.g. <code>+semver: minor</code> that is supposed to auto bump the version.</p>
  <p>I am using the latest GitVersion 5.5.1, and I changed my <code>master</code> branch to <code>main</code>, which is supposed to be supported in GitVersion 5.5+.
  I don't know if I am screwing something up in the conversion, or if 5.5.1 has a bug.</p>
  <p>My Project action config is here:
  <a href="https://github.com/ptr727/Utilities/blob/main/.github/workflows/BuildPublishPipeline.yml" rel="nofollow noreferrer">https://github.com/ptr727/Utilities/blob/main/.github/workflows/BuildPublishPipeline.yml</a></p>
  <p>I don't know if builds can be seen by others, but here is a build output where the minor versions should have been bumped by +semver to at least 1.4.1, not stuck on 1.4.0:
  <a href="https://github.com/ptr727/Utilities/runs/1437057234" rel="nofollow noreferrer">https://github.com/ptr727/Utilities/runs/1437057234</a></p>
  <p>Any ideas where I'm going wrong?</p>