update ci for documentation

Author: pa-lem

.github/workflows/ci.yml

@@ -474,7 +474,7 @@ jobs:
         with:
           node-version: 20
           cache: 'npm'
-          cache-dependency-path: package-lock.json
+          cache-dependency-path: docs/package-lock.json
       - name: "Install dependencies"
         run: npm install
       - name: "Setup Python environment"