Make the schemas.hpp generated file #include array

The script missed a #include.  Add it.

Tested: Code compiles.  Header change only.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ib38a46d8e97e4aadb596b4ff68795cea06e62fde
diff --git a/redfish-core/include/schemas.hpp b/redfish-core/include/schemas.hpp
index 89027f7..9418c13 100644
--- a/redfish-core/include/schemas.hpp
+++ b/redfish-core/include/schemas.hpp
@@ -10,6 +10,7 @@
  * github organization.
  ***************************************************************/
 // clang-format off
+#include <array>
 
 namespace redfish
 {