chore(ci): Bump docker/build-push-action from 5.4.0 to 6.0.2

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.4.0 to 6.0.2.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5.4.0...v6.0.2)

---
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/environment.yml

@@ -64,7 +64,7 @@ jobs:
             org.opencontainers.image.title=Vector development environment
             org.opencontainers.image.url=https://github.com/vectordotdev/vector
       - name: Build and push
-        uses: docker/build-push-action@v5.4.0
+        uses: docker/build-push-action@v6.0.2
         with:
           context: .
           file: ./scripts/environment/Dockerfile

.github/workflows/regression.yml

@@ -306,7 +306,7 @@ jobs:
         uses: docker/[email protected]
 
       - name: Build 'vector' target image
-        uses: docker/build-push-action@v5.4.0
+        uses: docker/build-push-action@v6.0.2
         with:
           context: baseline-vector/
           cache-from: type=gha
@@ -344,7 +344,7 @@ jobs:
         uses: docker/[email protected]
 
       - name: Build 'vector' target image
-        uses: docker/build-push-action@v5.4.0
+        uses: docker/build-push-action@v6.0.2
         with:
           context: comparison-vector/
           cache-from: type=gha