build(deps): bump go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc from 0.49.0 to 0.50.0 in /tools/invoker

build(deps): bump go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc from 0.49.0 to 0.50.0 in /tools/invoker #177