Bump Grpc.AspNetCore from 2.39.0 to 2.45.0

Bumps [Grpc.AspNetCore](https://github.com/grpc/grpc-dotnet) from 2.39.0 to 2.45.0.
- [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@v2.39.0...v2.45.0)

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

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

Author: dependabot[bot]

GreeterService/GreeterService.csproj

@@ -9,7 +9,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Grpc.AspNetCore" Version="2.39.0" />
+    <PackageReference Include="Grpc.AspNetCore" Version="2.45.0" />
   </ItemGroup>
 
 </Project>