[x86][owners] Remove yky@, add cja@

Change-Id: I7e2999dbeeb576c90101695285444a424cde2ef1
diff --git a/zircon/system/dev/board/x86/OWNERS b/zircon/system/dev/board/x86/OWNERS
index 67382e5..b63051d 100644
--- a/zircon/system/dev/board/x86/OWNERS
+++ b/zircon/system/dev/board/x86/OWNERS
@@ -1,3 +1,4 @@
+cja@google.com
 teisenbe@google.com
-yky@google.com
+venkateshs@google.com
 *