Bump actions/checkout from 4 to 6 (#65)

Author: dependabot[bot]

.github/workflows/docker.yml

@@ -65,7 +65,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3