ci(github-actions): bump docker/build-push-action (#66)

Bumps the github-actions group with 1 update: [docker/build-push-action](https://github.com/docker/build-push-action).


Updates `docker/build-push-action` from 5 to 6
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -168,7 +168,7 @@ jobs:
               id: build-ci
               env:
                   ENVIRONMENT: ci
-              uses: docker/build-push-action@v5
+              uses: docker/build-push-action@v6
               with:
                   target: ${{ env.ENVIRONMENT }}
                   cache-from: |
@@ -197,7 +197,7 @@ jobs:
               if: ${{ github.event_name != 'pull_request' }}
               env:
                   ENVIRONMENT: dev
-              uses: docker/build-push-action@v5
+              uses: docker/build-push-action@v6
               with:
                   target: ${{ env.ENVIRONMENT }}
                   cache-from: |
@@ -211,7 +211,7 @@ jobs:
               if: ${{ github.event_name != 'pull_request' }}
               env:
                   ENVIRONMENT: prod
-              uses: docker/build-push-action@v5
+              uses: docker/build-push-action@v6
               with:
                   cache-from: |
                       ${{ env.GHCR_IMAGE_NAME }}:dev