Bump docker/build-push-action from 6 to 7 (#527)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6 to 7.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6...v7)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/deploy-docker.yml

@@ -124,7 +124,7 @@ jobs:
             -
                 name: Build and push Docker image
                 id: build-and-push
-                uses: docker/build-push-action@v6
+                uses: docker/build-push-action@v7
                 with:
                     context: .
                     push: ${{ github.event_name != 'pull_request' }}

.github/workflows/test-pr-image-build.yml

@@ -31,7 +31,7 @@ jobs:
         -
             name: Build Docker image
             id: build
-            uses: docker/build-push-action@v6
+            uses: docker/build-push-action@v7
             with:
                 push: false
                 context: .