Update OAS version to 3.1.0

UEidentityAPI.json

 {
-  "openapi": "3.0.2",
+  "openapi": "3.1.0",
   "info": {
     "title": "UE Identity API",
     "version": "1.1.1",
@@ -307,4 +307,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file

UEidentityAPI.yaml

-openapi: 3.0.2
+openapi: 3.1.0
 info:
   title: UE Identity API
   version: 1.1.1
@@ -216,4 +216,4 @@ components:
       enum:
         - UNREGISTERED
         - REGISTERED
-      example: REGISTERED
+      example: REGISTERED
\ No newline at end of file