Add missed word to error message

Author: hebasto

src/net.cpp

@@ -2620,7 +2620,7 @@ bool CConnman::Start(CScheduler& scheduler, const Options& connOptions)
     if (connOptions.m_use_addrman_outgoing && !connOptions.m_specified_outgoing.empty()) {
         if (m_client_interface) {
             m_client_interface->ThreadSafeMessageBox(
-                _("Cannot provide specific connections and have addrman find outgoing connections at the same."),
+                _("Cannot provide specific connections and have addrman find outgoing connections at the same time."),
                 "", CClientUIInterface::MSG_ERROR);
         }
         return false;