Update RHCOS to OCP version map (redhat-best-practices-for-k8s#2441)

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

Author: github-actions[bot]

tests/platform/operatingsystem/files/rhcos_version_map

@@ -501,6 +501,7 @@
 4.5.7 / 45.82.202008150329-0
 4.5.8 / 45.82.202008290529-0
 4.5.9 / 45.82.202009040230-0
+4.6.0 / 46.82.202010091720-0
 4.6.0-fc.0 / 46.82.202008032211-0
 4.6.0-fc.1 / 46.82.202008140440-0
 4.6.0-fc.2 / 46.82.202008231640-0