Bump the dotnet group with 3 updates

Bumps the dotnet group with 3 updates: [Google.Protobuf](https://github.com/protocolbuffers/protobuf), [Grpc.Net.Client](https://github.com/grpc/grpc-dotnet) and [xunit](https://github.com/xunit/xunit).


Updates `Google.Protobuf` from 3.28.0 to 3.28.2
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.28.0...v3.28.2)

Updates `Grpc.Net.Client` from 2.65.0 to 2.66.0
- [Release notes](https://github.com/grpc/grpc-dotnet/releases)
- [Changelog](https://github.com/grpc/grpc-dotnet/blob/master/doc/release_process.md)
- [Commits](grpc/grpc-dotnet@v2.65.0...v2.66.0)

Updates `xunit` from 2.9.0 to 2.9.2
- [Commits](xunit/xunit@v2-2.9.0...v2-2.9.2)

---
updated-dependencies:
- dependency-name: Google.Protobuf
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
- dependency-name: Grpc.Net.Client
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
- dependency-name: xunit
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

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

src/Authzed.Net/Authzed.Net.csproj

@@ -30,9 +30,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.28.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.28.2" />
     <PackageReference Include="Grpc.Core" Version="2.46.6" />
-    <PackageReference Include="Grpc.Net.Client" Version="2.65.0" />
+    <PackageReference Include="Grpc.Net.Client" Version="2.66.0" />
     <PackageReference Include="Grpc.Tools" Version="2.66.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>

tests/Authzed.Net.Tests/Authzed.Net.Tests.csproj

@@ -11,7 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
-    <PackageReference Include="xunit" Version="2.9.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>