run nix develop with --command

Signed-off-by: Anirudh Oppiliappan <[e-mail]>

.tangled/workflows/deploy.yaml

···
 steps:
   - name: build site
     command: |
-      nix develop
-      vite build
+      nix develop --command bash -c 'vite build'
   - name: deploy
     command: |
       npx --yes wrangler deploy