Update the production URL.

Author: jyasskin

.github/workflows/release.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     environment:
       name: production
-      url: "https://vlach-cookbook.fly.dev/"
+      url: "https://cookbook.vlach.us/"
     steps:
     - uses: actions/checkout@v3
     - uses: superfly/flyctl-actions/setup-flyctl@master