Bump docker/build-push-action from 5 to 6 (#56)

Bumps [docker/build-push-action](https://github.com/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
...

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

.github/workflows/build.yml

@@ -21,7 +21,7 @@ jobs:
       run: |
         echo "$(make -s log | grep TAG)" >> "$GITHUB_ENV"
     - name: Build container image
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: .
         push: false
@@ -62,7 +62,7 @@ jobs:
       run: |
         echo "$(make -s log | grep TAG)" >> "$GITHUB_ENV"
     - name: Build container image
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: .
         push: false

.github/workflows/image-push.yml

@@ -40,7 +40,7 @@ jobs:
         password: ${{ env.DOCKER_PASSWORD }}
 
     - name: Build container image
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: .
         push: true