fail on high errors

Author: jamesc-grafana

.github/workflows/self-zizmor.yaml

@@ -44,7 +44,7 @@ jobs:
     uses: grafana/shared-workflows/.github/workflows/reusable-zizmor.yml@5793b5cefc1316d82c0d8842e6458a8a3d8cc847
     with:
       runs-on: ${{ !github.event.repository.private && 'ubuntu-latest' || 'ubuntu-arm64-small' }}
-      fail-severity: never
+      fail-severity: high
       min-severity: high
       min-confidence: low
       extra-args: --offline