Bump docker/build-push-action from 3 to 4

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3 to 4.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3...v4)

---
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]>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -33,7 +33,7 @@ jobs:
         run: echo "GIT_COMMIT=$(git rev-parse HEAD)" >> $GITHUB_ENV
 
       - name: Build x86_64 container into library
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: ./Dockerfile
@@ -46,7 +46,7 @@ jobs:
             ghcr.io/${{ env.REPO_OWNER }}/faas-netes:${{ github.sha }}
 
       - name: Build multi-arch containers for validation only
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: ./Dockerfile

.github/workflows/publish.yaml

@@ -49,7 +49,7 @@ jobs:
 
 
       - name: Push containers
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: ./Dockerfile