chore(deps): 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/main.yml

@@ -61,7 +61,7 @@ jobs:
           username: "NumaryBot"
           password: ${{ secrets.NUMARY_GITHUB_TOKEN }}
       - if: github.event.action == 'released'
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64
@@ -71,7 +71,7 @@ jobs:
             APP_SHA=${{ github.sha }}
             VERSION=${{ github.event.release.tag_name }}
       - if: github.event.action == 'prereleased'
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64
@@ -81,7 +81,7 @@ jobs:
             APP_SHA=${{ github.sha }}
             VERSION=${{ github.event.release.tag_name }}
       - if: github.event.action != 'released' || github.event.action != 'prereleased'
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64