Updated build-push-action to version 6.

Author: jlesage

.github/workflows/build-image.yml

@@ -115,7 +115,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
 
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: ${{ steps.prep.outputs.is_release == 'yes' }}
           provenance: false