Update deploy.yml to use NETLIFY_BUILD_HOOK

Author: coder13

.github/workflows/deploy.yml

@@ -0,0 +1,14 @@
+name: Weekly Netlify Deploy
+
+on:
+  schedule:
+    - cron: "0 17 * * 1"   # Monday at 17:00 UTC
+  workflow_dispatch: {}
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger Netlify deploy
+        run: |
+          curl -X POST -d '{}' "$NETLIFY_BUILD_HOOK"