update action checkout

Author: landerlini

.github/workflows/main.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: aiinfn-runner
     steps:
       - name: "Checkout package"
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - run: sudo apt-get update
       - run: sudo apt-get install -y doxygen graphviz
       - run: doxygen