chore(samples): bump version in samples (#658)

Author: FrodoTheTrue

packages/google-cloud-compute/samples/package.json

@@ -14,7 +14,7 @@
     "test": "mocha test --timeout 1200000"
   },
   "dependencies": {
-    "@google-cloud/compute": "^3.1.0-alpha.0",
+    "@google-cloud/compute": "^3.1.0",
     "@sendgrid/mail": "^7.0.0",
     "nodemailer": "^6.0.0",
     "nodemailer-smtp-transport": "^2.7.4"