fix: docs-test (#2297)

* fix: docs-test * fix: docs-test * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * refactor package.json * add config file * update linkinator config * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * revert change in concurrency * use github token to increase number of requests * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * downgrade linkinator version * refactor concurrency * skip samples in linkinator * refactor --------- Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: alkatrivedi

linkinator.config.json

@@ -5,7 +5,8 @@
  "www.googleapis.com",
  "img.shields.io",
  "https://console.cloud.google.com/cloudshell",
- "https://support.google.com"
+ "https://support.google.com",
+ "^https://github\\.com/googleapis/nodejs-spanner/blob/[^/]+/samples/.*"
  ],
  "silent": true,
  "concurrency": 5,