ci: Update workflow

Signed-off-by: Naomi Roberts <[e-mail]>

.tangled/workflows/deploy.yaml

···
       nix develop --command bash -c 'gleam run -m lustre/dev build'
       mkdir -p ./build/site/priv/static/
       cp index.html ./build/site/index.html
-      cp -r ./priv/static/ ./build/site/priv/static/
+      cp priv/static/voyagers_bingo.mjs ./build/site/priv/static/
   - name: deploy
     command: |
       npx --yes wrangler pages deploy ./build/site/ --project-name voyagers-bingo