Bump stackrox/actions from 1.0.19 to 1.0.20 (#100)

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -232,7 +232,7 @@ jobs:
         uses: stackrox/actions/infra/install-infractl@main
 
       - name: Create GKE cluster
-        uses: stackrox/actions/infra/create-cluster@v1.0.19
+        uses: stackrox/actions/infra/create-cluster@v1.0.20
         with:
           token: ${{ secrets.INFRA_TOKEN }}
           flavor: gke-default