fix itest.yml: checkout before refer to go.mod

.github/workflows/itest.yml

@@ -5,6 +5,9 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
       - name: Set up Go
         uses: actions/setup-go@v6
         with:
@@ -12,13 +15,10 @@ jobs:
           check-latest: true
 
       - name: Set up Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v6
         with:
           node-version: 24
 
-      - name: Checkout
-        uses: actions/checkout@v4
-
       - name: Execute the scripts
         run: |
           sudo apt update