Bump Google.Protobuf from 3.9.1 to 3.15.0 in /GRPC la fenice dei wcf/Demo/GRPC.Demo.TestClient#1

dependabot[bot] wants to merge 1 commit intomastersharpcode-it/SharpPitch:masterfrom

dependabot/nuget/GRPC-la-fenice-dei-wcf/Demo/GRPC.Demo.TestClient/Google.Protobuf-3.15.0sharpcode-it/SharpPitch:dependabot/nuget/GRPC-la-fenice-dei-wcf/Demo/GRPC.Demo.TestClient/Google.Protobuf-3.15.0Copy head branch name to clipboard