(deps): Bump LibGit2Sharp from 0.28.0 to 0.29.0 in /src

Bumps [LibGit2Sharp](https://github.com/libgit2/libgit2sharp) from 0.28.0 to 0.29.0.
- [Release notes](https://github.com/libgit2/libgit2sharp/releases)
- [Changelog](https://github.com/libgit2/libgit2sharp/blob/master/CHANGES.md)
- [Commits](libgit2/libgit2sharp@0.28.0...0.29.0)

---
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

@@ -4,7 +4,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="JsonSchema.Net.Generation" Version="3.5.0" />
-    <PackageVersion Include="LibGit2Sharp" Version="0.28.0" />
+    <PackageVersion Include="LibGit2Sharp" Version="0.29.0" />
     <PackageVersion Include="Microsoft.Build" Version="17.8.3" />
     <PackageVersion Include="Microsoft.Build.Utilities.Core" Version="17.8.3" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />