build(deps): bump Grpc.Net.Client in /src/AElf.CrossChain.Grpc

Bumps [Grpc.Net.Client](https://github.com/grpc/grpc-dotnet) from 2.46.0 to 2.52.0.
- [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@v2.46.0...v2.52.0)

---
updated-dependencies:
- dependency-name: Grpc.Net.Client
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/AElf.CrossChain.Grpc/AElf.CrossChain.Grpc.csproj

@@ -24,7 +24,7 @@
 
     <ItemGroup>
         <PackageReference Include="Grpc" Version="2.46.3" />
-        <PackageReference Include="Grpc.Net.Client" Version="2.46.0" />
+        <PackageReference Include="Grpc.Net.Client" Version="2.52.0" />
         <PackageReference Include="Grpc.Tools" Version="2.46.3" PrivateAssets="All" />
         <PackageReference Include="Contrib.Grpc.Core.M1" Version="2.41.0" />
     </ItemGroup>