Editorial: Improve netlify preview

[daniel-montalvo]

🚀 Netlify Preview:
🔄 this PR updates the following sspecs:

• accname preview — accname diff
• core-aam preview — core-aam diff
• ARIA preview — ARIA diff

@pkra @spectranaut @jnurthen

this updates the Netlify preview experience by updating the first comment of the GitHub issue with the specs that are changed as well as the diff with respect to their EDs

I tried just randomly changing ARIA and Core-AAM for uss to see how this would look like.

I think this should be good to land if you all agree, but before we land we should make sure we restore the spec source files.

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Preview | Diff

[netlify]

✅ Deploy Preview for wai-aria ready!

Name	Link
🔨 Latest commit	29e54a4
🔍 Latest deploy log	https://app.netlify.com/projects/wai-aria/deploys/69458a3af7a5d30008432b6f
😎 Deploy Preview	https://deploy-preview-2703--wai-aria.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

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[github-actions]

🚀 Deployed on https://deploy-preview-2703--wai-aria.netlify.app

[daniel-montalvo]

Fixes #2242

The downside with this is that it wouldn't work on forks as it depends on secrets to run. Other alternatives we've tried are either too noisy (they duplicate comments) or they'd require for us to change the structure of the repo, having one root index.html as an Overview page and making the main ARIA spec its own subfolder, similarly to how the other child specs work.
That's the approach they've taking for WCAG deploy previews, but I remember some people strongly argued not to change our repo structure when we took on the monorepo project.