Bump docker/build-push-action from 5.1.0 to 5.2.0 (#1682)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.1.0 to 5.2.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5.1.0...af5a7ed)

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

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

Author: dependabot[bot]

.github/workflows/functional.yml

@@ -78,7 +78,7 @@ jobs:
           TELEMETRY_ENDPOINT_INSECURE: "true"
 
       - name: Build NGF Docker Image
-        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5.1.0
+        uses: docker/build-push-action@af5a7ed5ba88268d5278f7203fb52cd833f66d6e # v5.2.0
         with:
           file: build/Dockerfile
           tags: ${{ steps.ngf-meta.outputs.tags }}
@@ -90,7 +90,7 @@ jobs:
           target: goreleaser
 
       - name: Build NGINX Docker Image
-        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5.1.0
+        uses: docker/build-push-action@af5a7ed5ba88268d5278f7203fb52cd833f66d6e # v5.2.0
         with:
           file: build/Dockerfile${{ matrix.nginx-image == 'nginx' && '.nginx' || '' }}${{ matrix.nginx-image == 'nginx-plus' && '.nginxplus' || ''}}
           tags: ${{ steps.nginx-meta.outputs.tags }}