Swap email signature to orange

[abovedave]

https://deploy-preview-2111--stacks.netlify.app/email/components/signatures/

The current email signature is a bit hard to dark mode so this swaps it for an orange variant that should work well on light and dark backgrounds.

Before

After

[changeset-bot]

⚠️ No Changeset found

Latest commit: 9cb2ecb

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

Click here to learn what changesets are, and how to add one.

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

[netlify]

✅ Deploy Preview for stacks ready!

Name	Link
🔨 Latest commit	9cb2ecb
🔍 Latest deploy log	https://app.netlify.com/projects/stacks/deploys/694595f22ca6d9000874e7dd
😎 Deploy Preview	https://deploy-preview-2111--stacks.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 project configuration.

[netlify]

✅ Deploy Preview for stacks-svelte ready!

Name	Link
🔨 Latest commit	9cb2ecb
🔍 Latest deploy log	https://app.netlify.com/projects/stacks-svelte/deploys/694595f400caa40008cbc9b2
😎 Deploy Preview	https://deploy-preview-2111--stacks-svelte.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 project configuration.