Bump NuGet.Common from 6.8.0 to 6.9.1

Bumps [NuGet.Common](https://github.com/NuGet/NuGet.Client) from 6.8.0 to 6.9.1.
- [Release notes](https://github.com/NuGet/NuGet.Client/releases)
- [Commits](https://github.com/NuGet/NuGet.Client/commits)

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

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

Author: dependabot[bot]

NStart/NStart.csproj

@@ -20,7 +20,7 @@
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.19.6" />
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Contracts" Version="5.0.2" />
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="8.0.0" />
-    <PackageReference Include="NuGet.Common" Version="6.8.0" />
+    <PackageReference Include="NuGet.Common" Version="6.9.1" />
     <PackageReference Include="NuGet.Protocol" Version="6.8.0" />
     <PackageReference Include="SonarAnalyzer.CSharp" Version="9.19.0.84025">
       <PrivateAssets>all</PrivateAssets>