Bump docker/build-push-action from 3 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/docker.yml

@@ -29,7 +29,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build and push arm64 image
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         continue-on-error: true
         with:
           context: .
@@ -39,7 +39,7 @@ jobs:
           tags: ultralytics/yolov5:latest-arm64
 
       - name: Build and push CPU image
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         continue-on-error: true
         with:
           context: .
@@ -48,7 +48,7 @@ jobs:
           tags: ultralytics/yolov5:latest-cpu
 
       - name: Build and push GPU image
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         continue-on-error: true
         with:
           context: .