Bluetooth: include: Fix wrong docs

We can't call function which used by static init veriable.

Signed-off-by: Lingao Meng <menglingao@xiaomi.com>

include/bluetooth/bluetooth.h

diff --git a/include/bluetooth/bluetooth.h b/include/bluetooth/bluetooth.h
index bb9cda3..92b67fe 100644
--- a/include/bluetooth/bluetooth.h
+++ b/include/bluetooth/bluetooth.h
@@ -386,7 +386,7 @@
 	 *  The application can set the device name itself by including the
 	 *  following in the advertising data.
 	 *  @code
-	 *  BT_DATA(BT_DATA_NAME_COMPLETE, name, strlen(name))
+	 *  BT_DATA(BT_DATA_NAME_COMPLETE, name, sizeof(name) - 1)
 	 *  @endcode
 	 */
 	BT_LE_ADV_OPT_USE_NAME = BIT(3),