message: Update `gcp-ts-functions` to show how to use an explicit runtime.
diff: import * as gcp from "@pulumi/gcp";
  +/**
  + * Deploy a function using the default runtime.
  + */
  const greeting = new gcp.cloudfunctions.HttpCallbackFunction("greeting", (req, res) => {
  res.send(`Greetings from ${req.body.name || "Google Cloud Functions"}!`);
  });
  @@ -15,3 +18,16 @@ const invoker = new gcp.cloudfunctions.FunctionIamMember("invoker", {
  });
  export const url = greeting.httpsTriggerUrl;
  +
  +/**
  + * Deploy a function using an explicitly set runtime.
  + */
  +const runtime = "nodejs14"; // https://cloud.google.com/functions/docs/concepts/exec#runtimes
  +const explicitRuntimeGreeting = new gcp.cloudfunctions.HttpCallbackFunction(`greeting-${runtime}`, {
  + runtime: runtime,
  + callback: (req, res) => {
  + res.send(`Greetings from ${req.body.name || "Google Cloud Functions"}!`);
  + },
  +});
  +
  +export const nodejs14Url = explicitRuntimeGreeting.httpsTriggerUrl;
  