Bump NGitLab from 6.39.0 to 6.50.0 in /src

Bumps [NGitLab](https://github.com/ubisoft/NGitLab) from 6.39.0 to 6.50.0.
- [Release notes](https://github.com/ubisoft/NGitLab/releases)
- [Commits](ubisoft/NGitLab@6.39.0...6.50.0)

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

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

src/GitReleaseManager.Core/GitReleaseManager.Core.csproj

@@ -23,7 +23,7 @@
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
           <PrivateAssets>all</PrivateAssets>
         </PackageReference>
-        <PackageReference Include="NGitLab" Version="6.39.0" />
+        <PackageReference Include="NGitLab" Version="6.50.0" />
         <PackageReference Include="Octokit" Version="10.0.0" />
         <PackageReference Include="Scriban" Version="5.9.0" />
         <PackageReference Include="seriloganalyzer" Version="0.15.0" />

src/GitReleaseManager.Tool/GitReleaseManager.Tool.csproj

@@ -38,7 +38,7 @@
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         <PrivateAssets>all</PrivateAssets>
         </PackageReference>
-        <PackageReference Include="NGitLab" Version="6.39.0" />
+        <PackageReference Include="NGitLab" Version="6.50.0" />
         <PackageReference Include="Octokit" Version="10.0.0" />
         <PackageReference Include="Serilog.Sinks.Console" Version="4.1.0" />
         <PackageReference Include="Serilog.Sinks.Debug" Version="2.0.0" PrivateAssets="All" />