docs: update workflow example to use latest actions

Author: DiogoRibeiro7

README.md

@@ -44,10 +44,10 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: 20