Fix typo in grpc example
Fix typo in grpc example

Signed-off-by: Te-Yu Chang <3e4b2c35a45ceed8a2004e9ea9acb465e64f297e@gmail.com>

cilium/cilium,tklauser/cilium,tgraf/cilium,michi-covalent/cilium,tklauser/cilium,tgraf/cilium,tgraf/cilium,tklauser/cilium,tgraf/cilium,tgraf/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium