Bump Grpc.Tools from 2.69.0 to 2.70.0 in the grpc group (#721)

Bumps the grpc group with 1 update: [Grpc.Tools](https://github.com/grpc/grpc).


Updates `Grpc.Tools` from 2.69.0 to 2.70.0
- [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: Grpc.Tools
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: grpc
...

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

Author: dependabot[bot]

samples/AspireShop/AspireShop.Frontend/AspireShop.Frontend.csproj

@@ -10,7 +10,7 @@
     <PackageReference Include="Microsoft.Extensions.ServiceDiscovery.Yarp" Version="9.1.0" />
     <PackageReference Include="Yarp.ReverseProxy" Version="2.2.0" />
     <PackageReference Include="Grpc.Net.ClientFactory" Version="2.67.0" />
-    <PackageReference Include="Grpc.Tools" Version="2.69.0">
+    <PackageReference Include="Grpc.Tools" Version="2.70.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>