[Docs] Add Google new favicon URL

[samiahmedsiddiqui]

Previously, Kapa.ai widget was loading favicon from https://www.google.com/s2/favicons?sz=128&domain=docs.yugabyte.com and we added a rule in CSP to allow loading favicon from this URL.

However, Google recently changed and now it redirects favicon requests. Now, when Kapa.ai widget tries to load the favicon from the https://www.google.com/s2/favicons?sz=128&domain=docs.yugabyte.com, Google redirects to a different URL.

Google has the following subdomains that can serve this request like:

1. https://t0.gstatic.com/faviconV2?client=SOCIAL&type=FAVICON&fallback_opts=TYPE,SIZE,URL&url=http://docs.yugabyte.com&size=128
2. https://t1.gstatic.com/faviconV2?client=SOCIAL&type=FAVICON&fallback_opts=TYPE,SIZE,URL&url=http://docs.yugabyte.com&size=128
3. https://t2.gstatic.com/faviconV2?client=SOCIAL&type=FAVICON&fallback_opts=TYPE,SIZE,URL&url=http://docs.yugabyte.com&size=128
4. https://t3.gstatic.com/faviconV2?client=SOCIAL&type=FAVICON&fallback_opts=TYPE,SIZE,URL&url=http://docs.yugabyte.com&size=128

This PR is to include all the above URLs in our CSP to resolve favicon loading issues.

[netlify]

✅ Deploy Preview for infallible-bardeen-164bc9 ready!

Built without sensitive environment variables

Name	Link
🔨 Latest commit	27c71b1
🔍 Latest deploy log	https://app.netlify.com/sites/infallible-bardeen-164bc9/deploys/667bbe8a6a1f7f00088f5dd3
😎 Deploy Preview	https://deploy-preview-23020--infallible-bardeen-164bc9.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.