(deps): Bump LibGit2Sharp from 0.27.2 to 0.28.0

Bumps [LibGit2Sharp](https://github.com/libgit2/libgit2sharp) from 0.27.2 to 0.28.0.
- [Release notes](https://github.com/libgit2/libgit2sharp/releases)
- [Changelog](https://github.com/libgit2/libgit2sharp/blob/master/CHANGES.md)
- [Commits](libgit2/libgit2sharp@0.27.2...0.28.0)

---
updated-dependencies:
- dependency-name: LibGit2Sharp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -5,7 +5,7 @@
   <ItemGroup>
     <PackageVersion Include="FluentDateTime" Version="2.1.0" />
     <PackageVersion Include="JsonSchema.Net.Generation" Version="3.4.2" />
-    <PackageVersion Include="LibGit2Sharp" Version="0.27.2" />
+    <PackageVersion Include="LibGit2Sharp" Version="0.28.0" />
     <PackageVersion Include="JetBrains.Annotations" Version="2023.2.0" />
     <PackageVersion Include="Microsoft.Build" Version="17.7.2" />
     <PackageVersion Include="Microsoft.Build.Utilities.Core" Version="17.7.2" />