Bump docker/build-push-action from 3 to 7

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3 to 7.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3...v7)

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

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

Author: dependabot[bot]

.github/workflows/wipac-cicd.yml

@@ -83,7 +83,7 @@ jobs:
           ref: ${{ github.sha }}  # lock to triggered commit (github.ref is dynamic)
           fetch-depth: 0  # setuptools-scm needs to access git tags
       - uses: docker/setup-buildx-action@v3
-      - uses: docker/build-push-action@v6
+      - uses: docker/build-push-action@v7
         with:
           context: .
           file: Dockerfile
@@ -123,7 +123,7 @@ jobs:
           ref: ${{ github.sha }}  # lock to triggered commit (github.ref is dynamic)
           fetch-depth: 0  # setuptools-scm needs to access git tags
       - uses: docker/setup-buildx-action@v3
-      - uses: docker/build-push-action@v6
+      - uses: docker/build-push-action@v7
         with:
           context: .
           cache-from: type=gha
@@ -153,7 +153,7 @@ jobs:
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.py3 }}
-      - uses: docker/build-push-action@v6
+      - uses: docker/build-push-action@v7
         with:
           context: .
           cache-from: type=gha