Update RHCOS to OCP version map (#3226)

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

Author: github-actions[bot]

tests/platform/operatingsystem/files/rhcos_version_map

@@ -612,6 +612,7 @@
 4.19.1 / 9.6.20250617-0
 4.19.10 / 9.6.20250826-1
 4.19.11 / 9.6.20250826-1
+4.19.12 / 9.6.20250909-0
 4.19.2 / 9.6.20250625-0
 4.19.3 / 9.6.20250701-0
 4.19.4 / 9.6.20250708-0
@@ -627,6 +628,7 @@
 4.20.0-ec.5 / 9.6.20250726-0
 4.20.0-ec.6 / 9.6.20250815-0
 4.20.0-rc.0 / 9.6.20250826-1
+4.20.0-rc.1 / 9.6.20250908-0
 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