[toranj] update config header to use `OT_LOG_LEVEL_INFO` (#9595)

diff --git a/tests/toranj/openthread-core-toranj-config.h b/tests/toranj/openthread-core-toranj-config.h
index 4b7ec74..7e2d4c7 100644
--- a/tests/toranj/openthread-core-toranj-config.h
+++ b/tests/toranj/openthread-core-toranj-config.h
@@ -111,7 +111,7 @@
 
 #define OPENTHREAD_CONFIG_MAC_FILTER_SIZE 80
 
-#define OPENTHREAD_CONFIG_LOG_LEVEL OT_LOG_LEVEL_DEBG
+#define OPENTHREAD_CONFIG_LOG_LEVEL OT_LOG_LEVEL_INFO
 
 #define OPENTHREAD_CONFIG_LOG_LEVEL_DYNAMIC_ENABLE 1