don't link check npm (#1568)

Author: minrk

.github/workflows/python-tests.yml

@@ -173,6 +173,8 @@ jobs:
       - uses: actions/checkout@v5
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
       - uses: jupyterlab/maintainer-tools/.github/actions/check-links@v1
+        with:
+          ignore_links: "https://www.npmjs.com"
 
   integration_check:
     runs-on: ${{ matrix.os }}