Fix some more includes

clang-tidy warns on these when run directly in a header file.  Fix them.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ib3366699c36e85644107690c23467f2ed22e398d
diff --git a/redfish-core/lib/update_service.hpp b/redfish-core/lib/update_service.hpp
index 041e072..cf5ac0d 100644
--- a/redfish-core/lib/update_service.hpp
+++ b/redfish-core/lib/update_service.hpp
@@ -25,6 +25,7 @@
 #include "utils/dbus_utils.hpp"
 #include "utils/sw_utils.hpp"
 
+#include <boost/algorithm/string/case_conv.hpp>
 #include <boost/system/error_code.hpp>
 #include <sdbusplus/asio/property.hpp>
 #include <sdbusplus/bus/match.hpp>