Update platform field

Author: xiaojiey

linux_os/guide/system/permissions/restrictions/coredumps/service_systemd-coredump_disabled/rule.yml

@@ -15,7 +15,7 @@ rationale: |-
 
 severity: medium
 
-platform: system_with_kernel
+platform: system_with_kernel or multi_platform_rhcos
 
 identifiers:
     cce@rhcos4: CCE-82530-7