Bump docker/build-push-action from 5 to 6 (#273)

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

.github/workflows/ci_container_provisioner.yml

@@ -56,7 +56,7 @@ jobs:
           logout: true
 
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./container_provisioner
           platforms: linux/amd64

.github/workflows/ci_scraper.yml

@@ -57,7 +57,7 @@ jobs:
           logout: true
 
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./scraper
           platforms: linux/amd64

.github/workflows/ci_vpn_worker.yml

@@ -45,7 +45,7 @@ jobs:
           logout: true
 
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./proxy_pool
           platforms: linux/amd64