build(deps): bump docker/build-push-action from 5 to 6

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]>

.github/workflows/ci.yml

@@ -75,7 +75,7 @@ jobs:
 
       - name: Build linter dependencies image
         if: env.CACHE_HIT == 'false'
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: true
@@ -109,7 +109,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Build linter image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ./Dockerfile_linter
@@ -163,7 +163,7 @@ jobs:
 
       - name: Build and push image if input files changed
         if: env.CACHE_HIT == 'false'
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: Dockerfile_dependencies
@@ -217,7 +217,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Build unit test image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           target: builder
@@ -236,7 +236,7 @@ jobs:
 
       - name: Build and push production image
         if: ${{ github.event_name == 'push' }}
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: true