Add vpatch-CVE-2026-21643 rule to vpatch collection

Author: crowdsec-automation

collections/crowdsecurity/appsec-virtual-patching.yaml

@@ -122,6 +122,7 @@ appsec-rules:
 - crowdsecurity/vpatch-CVE-2019-5418
 - crowdsecurity/vpatch-CVE-2025-52488
 - crowdsecurity/vpatch-CVE-2025-49132
+- crowdsecurity/vpatch-CVE-2026-21643
 - crowdsecurity/vpatch-CVE-2025-47812
 - crowdsecurity/vpatch-CVE-2024-51977
 - crowdsecurity/vpatch-CVE-2022-31499