chore(deps): bump the ngitlab group with 3 updates

Bumps the ngitlab group with 3 updates: [NGitLab](https://github.com/ubisoft/NGitLab), [System.Text.Json](https://github.com/dotnet/runtime) and [NGitLab.Mock](https://github.com/ubisoft/NGitLab).


Updates `NGitLab` from 6.58.0 to 6.59.0
- [Release notes](https://github.com/ubisoft/NGitLab/releases)
- [Commits](ubisoft/NGitLab@6.58.0...6.59.0)

Updates `System.Text.Json` from 9.0.0 to 8.0.5
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v9.0.0...v8.0.5)

Updates `NGitLab.Mock` from 6.58.0 to 6.59.0
- [Release notes](https://github.com/ubisoft/NGitLab/releases)
- [Commits](ubisoft/NGitLab@6.58.0...6.59.0)

---
updated-dependencies:
- dependency-name: NGitLab
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ngitlab
- dependency-name: System.Text.Json
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ngitlab
- dependency-name: NGitLab.Mock
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ngitlab
...

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

src/GitSync.GitLab/GitSync.GitLab.csproj

@@ -11,7 +11,7 @@
     <PackageReference Include="ConfigureAwait.Fody" Version="3.3.2" PrivateAssets="all" />
     <PackageReference Include="Fody" Version="6.9.1" PrivateAssets="all" />
     <PackageReference Include="GitSync" Version="2.0.0-beta.1" />
-    <PackageReference Include="NGitLab" Version="6.58.0" />
+    <PackageReference Include="NGitLab" Version="6.59.0" />
     <PackageReference Include="System.Text.Json" Version="9.0.0" />
   </ItemGroup>
 

test/unit/GitSync.GitLab.Tests.csproj

@@ -11,7 +11,7 @@
     <PackageReference Include="coverlet.collector" Version="6.0.2" />
     <PackageReference Include="FluentAssertions" Version="6.12.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="NGitLab.Mock" Version="6.58.0" />
+    <PackageReference Include="NGitLab.Mock" Version="6.59.0" />
     <PackageReference Include="Verify.ClipboardAccept" Version="28.4.0" />
     <PackageReference Include="Verify.Xunit" Version="28.4.0" />
     <PackageReference Include="xunit" Version="2.9.2" />