Bump Grpc.AspNetCore from 2.67.0 to 2.70.0 (#379)

Bumps [Grpc.AspNetCore](https://github.com/grpc/grpc-dotnet) 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)

---
updated-dependencies:
- dependency-name: Grpc.AspNetCore
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageVersion Include="coverlet.collector" Version="6.0.4" />
     <PackageVersion Include="Google.Protobuf" Version="3.30.0" />
-    <PackageVersion Include="Grpc.AspNetCore" Version="2.67.0" />
+    <PackageVersion Include="Grpc.AspNetCore" Version="2.70.0" />
     <PackageVersion Include="Grpc.Net.Client" Version="2.70.0" />
     <PackageVersion Include="Grpc.Tools" Version="2.71.0" />
     <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="8.0.14" />