Bump Microsoft.Extensions.DependencyInjection in /dotnet-etcd

Bumps [Microsoft.Extensions.DependencyInjection](https://github.com/dotnet/runtime) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v7.0.0...v8.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.DependencyInjection
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

dotnet-etcd/dotnet-etcd.csproj

@@ -68,7 +68,7 @@ Advanced uses take advantage of the consistency guarantees to implement database
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
 
     <Protobuf Include="grpc\proto\etcd\auth.proto" GrpcServices="Client" />
     <Protobuf Include="grpc\proto\etcd\election.proto" GrpcServices="Client" />