Bump actions/checkout from 5 to 6 in the actions group (#36)

Author: dependabot[bot]

.github/workflows/docker-publish.yml

@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # Install the cosign tool except on PR
       # https://github.com/sigstore/cosign-installer

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       # Uses the `docker/login-action` action to log in to the Container registry registry using the account and password that will publish the packages. Once published, the packages are scoped to the account defined here.
       - name: Build and push Docker image
         uses: docker/build-push-action@v6