Bump GitVersion.MsBuild from 5.7.0 to 5.8.1
Bump GitVersion.MsBuild from 5.7.0 to 5.8.1

Bumps [GitVersion.MsBuild](https://github.com/GitTools/GitVersion) from 5.7.0 to 5.8.1.
- [Release notes](https://github.com/GitTools/GitVersion/releases)
- [Changelog](https://github.com/GitTools/GitVersion/blob/main/BREAKING_CHANGES.md)
- [Commits](https://github.com/GitTools/GitVersion/compare/5.7.0...5.8.1)

---
updated-dependencies:
- dependency-name: GitVersion.MsBuild
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
y-iihoshi/ThScoreFileConverter,y-iihoshi/ThScoreFileConverter