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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -148,7 +148,7 @@ jobs:
           cache-from: "${{ env.CACHE_FROM }}"
 
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Test image
         run: |

.github/workflows/dev-build.yml

@@ -26,7 +26,7 @@ jobs:
 
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             # Login against a container registry
             # https://github.com/docker/login-action