build(deps): bump docker/build-push-action

Bumps the docker-github-actions group with 1 update: [docker/build-push-action](https://github.com/docker/build-push-action).


Updates `docker/build-push-action` from 6.7.0 to 6.8.0
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@5cd11c3...32945a3)

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

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

.github/workflows/s3-gateway.yml

@@ -37,7 +37,7 @@ jobs:
         uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
 
       - name: Build and export
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
         with:
           file: Dockerfile.oss
           context: .
@@ -119,7 +119,7 @@ jobs:
           docker load --input ${{ runner.temp }}/oss.tar
 
       - name: Build and load oss image
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
         with:
           file: Dockerfile.latest-njs
           context: .
@@ -204,7 +204,7 @@ jobs:
           docker load --input ${{ runner.temp }}/oss.tar
 
       - name: Build and load oss image
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
         with:
           file: Dockerfile.unprivileged
           context: .
@@ -297,7 +297,7 @@ jobs:
 
       # Do an initial build of the base image and push to a local registry for downstream images because the `docker-container` driver can't find local images with `load`.
       - name: Build and push image [oss] to local registry for downstream
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
         with:
           file: Dockerfile.oss
           context: .
@@ -321,7 +321,7 @@ jobs:
 
       # This second invocation of the build/push should just use the existing build cache.
       - name: Build and push image [oss]
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
         with:
           file: Dockerfile.oss
           context: .
@@ -335,7 +335,7 @@ jobs:
             nginxinc/nginx-s3-gateway:latest
 
       - name: Build and push image [latest-njs]
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
         with:
           file: Dockerfile.latest-njs
           context: .
@@ -351,7 +351,7 @@ jobs:
             nginxinc/nginx-s3-gateway:latest-njs-oss
 
       - name: Build and push image [unprivileged]
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
         with:
           file: Dockerfile.unprivileged
           context: .