Update search-index-update.yml

Author: Layoric

.github/workflows/search-index-update.yml

@@ -20,10 +20,9 @@ jobs:
       run_update: ${{ steps.date_check.outputs.run_update }}
     steps:
       - uses: actions/checkout@v1
-      - name: Setup node
-        uses: actions/setup-node@v1
+      - uses: actions/setup-node@v4
         with:
-          node-version: 14
+          node-version: 20
 
       - name: Check commit date
         id: date_check