chore: renew expired xlsx audit exceptions to 2026-07-06

.github/audit-exceptions.yml

@@ -5,14 +5,14 @@ exceptions:
     severity: high
     reason: "Admin export only; switched to dynamic import to reduce exposure (CVE-2023-30533)"
     mitigation: "Load only on export; restrict export permissions and data scope"
-    expires_on: "2026-04-05"
+    expires_on: "2026-07-06"
     owner: "security@your-domain"
   - package: xlsx
     advisory: "GHSA-5pgg-2g8v-p4x9"
     severity: high
     reason: "Admin export only; switched to dynamic import to reduce exposure (CVE-2024-22363)"
     mitigation: "Load only on export; restrict export permissions and data scope"
-    expires_on: "2026-04-05"
+    expires_on: "2026-07-06"
     owner: "security@your-domain"
   - package: lodash
     advisory: "GHSA-r5fr-rjxr-66jc"