Bump GitVersion.MsBuild from 5.12.0 to 6.0.3

Bumps [GitVersion.MsBuild](https://github.com/GitTools/GitVersion) from 5.12.0 to 6.0.3.
- [Release notes](https://github.com/GitTools/GitVersion/releases)
- [Changelog](https://github.com/GitTools/GitVersion/blob/main/BREAKING_CHANGES.md)
- [Commits](GitTools/GitVersion@5.12.0...6.0.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Directory.Packages.props

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
     <ItemGroup>
-        <PackageReference Include="GitVersion.MsBuild" Version="5.12.0">
+        <PackageReference Include="GitVersion.MsBuild" Version="6.0.3">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>