fix(site): name the Worker "durable" to match Cloudflare

Workers Builds requires the name in wrangler.jsonc to match the Worker
the repository is connected to, which is "durable".

Claude-Session: https://claude.ai/code/session_012aEMFtJKJsMz1vGtbSijGR

Author: kasvith

site/wrangler.jsonc

@@ -3,7 +3,7 @@
 // `pnpm run deploy` builds the site and deploys it.
 {
   "$schema": "node_modules/wrangler/config-schema.json",
-  "name": "durable-site",
+  "name": "durable",
   "compatibility_date": "2026-10-01",
   "assets": {
     "directory": "./dist",