chore: more reproducible build

Signed-off-by: Matej Vašek <matejvasek@gmail.com>

Author: matejvasek

.github/workflows/ci.yml

@@ -71,6 +71,7 @@ jobs:
         with:
           context: .
           push: false
+          provenance: false
           # Multi-arch is required for OCP.
           platforms: linux/amd64,linux/arm64,linux/ppc64le,linux/s390x
           cache-from: type=gha
@@ -107,6 +108,7 @@ jobs:
         with:
           context: .
           push: true
+          provenance: false
           platforms: linux/amd64,linux/arm64,linux/ppc64le,linux/s390x
           tags: |
             ${{ env.IMAGE }}:latest