potluck: README: workerd, not a vendor

Generated-by: Claude Opus 5.5

potluck/README.md

@@ -24,7 +24,8 @@ pnpm dev           # → http://localhost:4321/issues
   an [h-cite](https://microformats.org/wiki/h-cite).
 - **Plain HTML** that's easy to read: system fonts, one column.
 - **A real editor:** it's an [EmDash](https://docs.emdashcms.com/) site,
-  so you write issues in its admin UI, and it runs on Cloudflare Workers.
+  so you write issues in its admin UI. It runs in
+  [workerd](https://github.com/cloudflare/workerd), on your machine or a host.
 
 How it's put together, checks, and deploying:
 [CONTRIBUTING](CONTRIBUTING.md).