[patch] Update OCP support dates for 4.20 and 4.18 (#259)

Author: prveenkumr

src/mas/devops/data/ocp.yaml

@@ -16,7 +16,7 @@ ocp_versions:
 
   "4.20":
     ga_date: "October 21, 2025"
-    standard_support: "May 3, 2026"
+    standard_support: "April 21, 2027"
     extended_support: "October 21, 2028"
 
   "4.19":
@@ -26,8 +26,8 @@ ocp_versions:
 
   "4.18":
     ga_date: "February 25, 2025"
-    standard_support: "February 25, 2025"
-    extended_support: "August 25, 2026"
+    standard_support: "August 25, 2026"
+    extended_support: "February 25, 2028"
 
   "4.17":
     ga_date: "October 1, 2024"