Add discourse to social icons

[joshka]

Description

Forum software - https://discourse.org/

The middle icon is the new icon (in the context of https://github.com/ratatui-org/ratatui-website/)

[changeset-bot]

🦋 Changeset detected

Latest commit: 119d5c9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@astrojs/starlight	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated (UTC)
starlight	✅ Ready (Inspect)	Visit Preview	May 21, 2024 10:57am

[astrobot-houston]

Hello! Thank you for opening your first PR to Starlight! ✨

Here’s what will happen next:

1. Our GitHub bots will run to check your changes.
   If they spot any issues you will see some error messages on this PR.
   Don’t hesitate to ask any questions if you’re not sure what these mean!

2. In a few minutes, you’ll be able to see a preview of your changes on Vercel 🤩

3. One or more of our maintainers will take a look and may ask you to make changes.
   We try to be responsive, but don’t worry if this takes a few days.

[delucis]

Thank you for the contribution @joshka! Have one small suggestion.

I might also move the new discourse entry in Icons.ts up to be with the other social icons although we don’t have a strict rule about this, i.e. I guess immediately after blueSky would make sense to keep social platforms roughly grouped together.

[joshka]

I might also move the new discourse entry in Icons.ts up to be with the other social icons although we don’t have a strict rule about this, i.e. I guess immediately after blueSky would make sense to keep social platforms roughly grouped together.

done in 39de623

[delucis]

Thank you @joshka — looks great 🙌

Will merge this when we’re ready to cut our next patch release. (Merged PRs go live in our docs immediately, so we hold off until just before release to avoid someone seeing a feature in the docs that isn’t actually available yet.)