Add Diff syntax to supported languages

[ferd]

Also a useful thing!

[netlify[bot]]

✅ Deploy Preview for codehost-wavebeem ready!

Name	Link
🔨 Latest commit	c424f088e485c43a83d92e336fe3eb1db7910320
🔍 Latest deploy log	https://app.netlify.com/sites/codehost-wavebeem/deploys/641891a79acb2e0008d89847
😎 Deploy Preview	https://deploy-preview-5--codehost-wavebeem.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 settings.

[wavebeem]

Thanks!