chore(deps): bump google.golang.org/grpc in /tests/apps/gogrpc

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.25.0 to 1.25.1.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.25.0...v1.25.1)

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

tests/apps/gogrpc/go.mod

@@ -16,7 +16,7 @@ require (
 	golang.org/x/tools v0.0.0-20190822000311-fc82fb2afd64 // indirect
 	google.golang.org/api v0.9.0 // indirect
 	google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 // indirect
-	google.golang.org/grpc v1.25.0
+	google.golang.org/grpc v1.25.1
 	honnef.co/go/tools v0.0.1-2019.2.2 // indirect
 )