Update features/FEATURE_BLE/targets/TARGET_CORDIO/driver/CordioHCIDriver.h

Fix doxygen as suggested by @pan-

Co-Authored-By: donatieng <[email protected]>

Author: pan-

features/FEATURE_BLE/targets/TARGET_CORDIO/driver/CordioHCIDriver.h

@@ -128,7 +128,8 @@ class CordioHCIDriver {
 
 protected:
     /**
-     * Return a defai;t set of memory pool which will be used by the Cordio stack
+     * Return a default set of memory pool which can be used by the Cordio stack
+     * This function can be used to implement get_buffer_pool_description().
      */
     buf_pool_desc_t get_default_buffer_pool_description();