Bump NuGet.Protocol from 6.3.1 to 6.3.3 in /src/Shared (#431)

Bumps [NuGet.Protocol](https://github.com/NuGet/NuGet.Client) from 6.3.1 to 6.3.3.
- [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
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Shared/Shared.Lib.csproj

@@ -43,7 +43,7 @@
         <PackageReference Include="NLog" Version="5.0.4" />
         <PackageReference Include="NLog.Schema" Version="5.0.4" />
         <PackageReference Include="NuGet.Packaging" Version="6.3.1" />
-        <PackageReference Include="NuGet.Protocol" Version="6.3.1" />
+        <PackageReference Include="NuGet.Protocol" Version="6.3.3" />
         <PackageReference Include="Octokit" Version="4.0.1" />
         <PackageReference Include="packageurl-dotnet" Version="1.3.0" />
         <PackageReference Include="Polly.Contrib.WaitAndRetry" Version="1.1.1" />