Bump GrpcVersion from 2.63.0 to 2.66.0

Bumps `GrpcVersion` from 2.63.0 to 2.66.0.

Updates `Grpc.AspNetCore` from 2.63.0 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@v2.63.0...v2.66.0)

Updates `Grpc.AspNetCore.Server.ClientFactory` from 2.63.0 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@v2.63.0...v2.66.0)

Updates `Grpc.Tools` from 2.63.0 to 2.66.0
- [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.AspNetCore
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: Grpc.AspNetCore.Server.ClientFactory
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: Grpc.Tools
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -7,7 +7,7 @@
     <EfVersion>8.0.7</EfVersion>
     <AspireVersion>8.0.0</AspireVersion>
     <AspireUnstablePackagesVersion>8.0.0-preview.8.24258.2</AspireUnstablePackagesVersion>
-    <GrpcVersion>2.63.0</GrpcVersion>
+    <GrpcVersion>2.66.0</GrpcVersion>
     <DuendeVersion>7.0.6</DuendeVersion>
     <ApiVersioningVersion>8.1.0</ApiVersioningVersion>
   </PropertyGroup>