Update rhcos-table.md

Signed-off-by: GitHub <noreply@github.com>

Author: yussufsh

docs/rhcos-table.md

@@ -1,6 +1,6 @@
 | OCP Version | RHCOS Image File Name |
 | ----------- | --------------------- |
-| 4.18 | rhcos-418-94-202410090804-0-ppc64le-powervs.ova.gz |
+| 4.18 | rhcos-418-94-202411221729-0-ppc64le-powervs.ova.gz |
 | 4.17 | rhcos-417-94-202410090854-0-ppc64le-powervs.ova.gz |
 | 4.16 | rhcos-416-94-202410211619-0-ppc64le-powervs.ova.gz |
 | 4.15 | rhcos-415-92-202407091355-0-ppc64le-powervs.ova.gz |