docs(samples): add example tags to generated samples (#287)

* docs(samples): add example tags to generated samples

PiperOrigin-RevId: 408439482

Source-Link: googleapis/googleapis@b9f6184

Source-Link: https://github.com/googleapis/googleapis-gen/commit/eb888bc214efc7bf43bf4634b470254565a659a5
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiZWI4ODhiYzIxNGVmYzdiZjQzYmY0NjM0YjQ3MDI1NDU2NWE2NTlhNSJ9

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* chore: change node version for sample

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Takashi Matsuo <tmatsuo@google.com>

cloudbuild/package.json

@@ -9,7 +9,7 @@
   "author": "Google Inc.",
   "repository": "googleapis/nodejs-cloudbuild",
   "engines": {
-    "node": ">=8"
+    "node": ">=10"
   },
   "scripts": {
     "test": "c8 mocha system-test --timeout=800000"