ci: Update workflow

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

.tangled/workflows/deploy.yaml

···
       nix develop --command bash -c 'gleam run -m build'
   - name: deploy
     command: |
-      npx --yes wrangler pages deploy ./priv --project-name naomieow-site
+      npx --yes wrangler pages deploy ./priv --project-name naomieow-site --branch main