Bump the dotnet group with 3 updates (#33)

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


Updates `Google.Protobuf` from 3.29.3 to 3.30.2
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](https://github.com/protocolbuffers/protobuf/commits)

Updates `Grpc.Net.Client` from 2.67.0 to 2.70.0
- [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@v2.67.0...v2.70.0)

Updates `Grpc.Tools` from 2.70.0 to 2.71.0
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](https://github.com/grpc/grpc/commits)

---
updated-dependencies:
- dependency-name: Google.Protobuf
  dependency-version: 3.30.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
- dependency-name: Grpc.Net.Client
  dependency-version: 2.70.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
- dependency-name: Grpc.Tools
  dependency-version: 2.71.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
...

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

Author: dependabot[bot]

src/Authzed.Net/Authzed.Net.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
@@ -30,10 +30,10 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.29.3" />
+    <PackageReference Include="Google.Protobuf" Version="3.30.2" />
     <PackageReference Include="Grpc.Core" Version="2.46.6" />
-    <PackageReference Include="Grpc.Net.Client" Version="2.67.0" />
-    <PackageReference Include="Grpc.Tools" Version="2.70.0">
+    <PackageReference Include="Grpc.Net.Client" Version="2.70.0" />
+    <PackageReference Include="Grpc.Tools" Version="2.71.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>