fix bug that there's very low ratio to cause BLE assert(32768, 0) in rwble.c at line 222

diff --git a/components/bt/lib b/components/bt/lib
index 99f0f0e21871585021ffda47912e9b8a05958422..1b7ad41d258dae8b60a1324bedd027de723c9a14 160000 (submodule)
--- a/components/bt/lib
+++ b/components/bt/lib
@@ -1 +1 @@
-Subproject commit 99f0f0e21871585021ffda47912e9b8a05958422
+Subproject commit 1b7ad41d258dae8b60a1324bedd027de723c9a14