Update RHCOS to OCP version map (#2870)

Co-authored-by: sebrandon1 <[email protected]>

Author: github-actions[bot]

tests/platform/operatingsystem/files/rhcos_version_map

@@ -521,6 +521,7 @@
 4.18.3 / 418.94.202502250906-0
 4.18.4 / 418.94.202503061016-0
 4.18.5 / 418.94.202503102036-0
+4.18.6 / 418.94.202503181639-0
 4.4.0 / 44.81.202004260825-0
 4.4.0-rc.0 / 44.81.202003110830-0
 4.4.0-rc.1 / 44.81.202003130330-0