Updated private build #2

.github/workflows/build-private.yml

@@ -42,6 +42,9 @@ jobs:
           only_args: --no-dev --no-ansi --no-interaction --prefer-dist --ignore-platform-reqs --classmap-authoritative
           php_version: 8.3
 
+      - name: "Install npm dependencies in billing extension"
+        run: cd extensions/Billing && npm ci
+
       - name: "Checkout services extension"
         uses: actions/checkout@v4
         with: