Update ci.yml workflow error, node version change

.github/workflows/ci.yml

@@ -1,11 +1,20 @@
 name: Beautiful Jekyll CI
+
 on: [push, pull_request]
+
 jobs:
   build:
     name: Build Jekyll
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '20'
+
       - name: Build the site in the jekyll/builder container
         run: |
           export JEKYLL_VERSION=3.8