Fix node.js setup for GH Action.

.github/workflows/update-docs.yml

@@ -26,6 +26,7 @@ jobs:
         with:
           node-version: 22
           cache: yarn
+          cache-dependency-path: ./docs/yarn.lock
       - name: Install dependencies
         working-directory: ./docs
         run: yarn install --frozen-lockfile --non-interactive