Bump Google.Protobuf from 3.21.4 to 3.22.1

Bumps [Google.Protobuf](https://github.com/protocolbuffers/protobuf) from 3.21.4 to 3.22.1.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/generate_changelog.py)
- [Commits](protocolbuffers/protobuf@v3.21.4...v3.22.1)

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

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

Author: dependabot[bot]

src/WebSocketeer/WebSocketeer.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="NuGetizer" Version="1.0.1" PrivateAssets="all" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="all" />
-    <PackageReference Include="Google.Protobuf" Version="3.21.4" />
+    <PackageReference Include="Google.Protobuf" Version="3.22.1" />
     <PackageReference Include="Grpc.AspNetCore" Version="2.47.0" Pack="false" />
     <PackageReference Include="RxFree" Version="1.1.2" PrivateAssets="all" />
     <PackageReference Include="WebSocketChannel" Version="1.0.1" />