Add deed.page to Classic Web Hosts - #2381

Adds deed.page to the Classic Web Hosts list in src/docs/deployment.md (one classicHosts entry in the front matter, after Orbiter, using the same name / url / screenshotSize: medium fields as the others).

It fits that section's flow: after npx @11ty/eleventy, the _site folder is uploaded by hand. With deed.page that upload is one command and needs no account:

tar -C _site -czf site.tar.gz .
curl -T site.tar.gz "https://deed.page/v1/sites?slug=my-site"

The response returns a live https://my-site.deed.page/ URL and a token for later updates. I ran this against a fresh Eleventy 3 build and the site came up as expected. The free plan needs no signup.

• Site: https://deed.page
• Docs: https://deed.page/docs
• Agent skill (MIT): https://github.com/f-o-x11/deed-page-skill

This PR comes from the deed.page team. Disclosure: I work on deed.page (Avatar 8 LLC).