component/bt:fix connection params update issues

diff --git a/components/bt/lib b/components/bt/lib
index 1c4b96d237abe47d25b5b1a807b1f3b7fed60f93..a6f784dbb868d6860910d6c8833e83bee60bf0e4 160000 (submodule)
--- a/components/bt/lib
+++ b/components/bt/lib
@@ -1 +1 @@
-Subproject commit 1c4b96d237abe47d25b5b1a807b1f3b7fed60f93
+Subproject commit a6f784dbb868d6860910d6c8833e83bee60bf0e4