fix: action version

Author: bitnik

.github/workflows/hcloud-image-builder.yaml

@@ -42,7 +42,7 @@ jobs:
     steps:
       # https://github.com/actions/checkout
       - name: Checkout
-        uses: actions/checkout@v6.1.0
+        uses: actions/checkout@v6.0.1
 
       - name: Build
         shell: bash