Update github-actions to v6

Author: renovate[bot]

.github/workflows/docker-image-build.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: 📦 Set up QEMU
         uses: docker/setup-qemu-action@v3
@@ -36,7 +36,7 @@ jobs:
           echo "TAG=$(echo ${{ github.event.release.tag_name }} | sed 's/^v//')" >> $GITHUB_ENV
 
       - name: 🏗 Build and push Docker image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           provenance: false