opensearch-dashboard: ignore CVE-2025-68428

CVE-2025-68428 is still present in opensearch-dashboards 2.19.4
because jspdf is still in version 3.0.1

Author: elelaysh

etc/kayobe/trivy/allowed-vulnerabilities.yml

@@ -20,6 +20,8 @@ influxdb_allowed_vulnerabilities:
   - CVE-2024-45337
 magnum_conductor_allowed_vulnerabilities:
   - CVE-2024-45337
+opensearch_dashboards_allowed_vulnerabilities:
+  - CVE-2025-68428
 prometheus_blackbox_exporter_allowed_vulnerabilities:
   - CVE-2024-24790
   - CVE-2024-45337