chore(deps): update vexxhost/github-actions digest to 1a9b39d

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/periodic.yaml

@@ -17,6 +17,6 @@ jobs:
         with:
           egress-policy: audit
 
-      - uses: vexxhost/github-actions/scan-image@377e35d3a5c570338901d9e0edf48bcf86c7c9ef # main
+      - uses: vexxhost/github-actions/scan-image@1a9b39d8b3f28736b3ad19b45cd9493a91aa2519 # main
         with:
           image-ref: ghcr.io/${{ github.repository_owner }}/openstack-database-exporter:edge