Merge pull request #178 from stackitcloud/renovate/actions-checkout-6.x

chore(deps): update actions/checkout action to v6

Author: jojomo96

.github/workflows/main.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install Go
         uses: actions/setup-go@v6