Bump NuGet.Protocol from 6.8.0 to 6.9.1

Bumps [NuGet.Protocol](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.Protocol
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/dotnet-tor/dotnet-tor.csproj

@@ -16,7 +16,7 @@
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="all" />
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta1.21216.1" />
     <PackageReference Include="ThisAssembly" Version="1.4.3" />
-    <PackageReference Include="NuGet.Protocol" Version="6.8.0" />
+    <PackageReference Include="NuGet.Protocol" Version="6.9.1" />
     <PackageReference Include="Spectre.Console" Version="0.48.0" />
     <PackageReference Include="Humanizer.Core" Version="2.14.1" />
     <PackageReference Include="Knapcode.TorSharp" Version="2.15.0" />