Fix workflow

NP-1311

Author: wawanbreton

.github/workflows/npm-package.yml

@@ -43,7 +43,7 @@ jobs:
         run: npm install -g typescript@5.6.2
 
       - name: Download extra artifact
-        if: ${{ extra_artifact != '' }}
+        if: ${{ inputs.extra_artifact != '' }}
         uses: actions/download-artifact@v8
         with:
           name: ${{ extra_artifact }}