softdevice_controller: update CHANGELOG.rst

Minor document convention updates.

Signed-off-by: Lang Xie <lang.xie@nordicsemi.no>

softdevice_controller/CHANGELOG.rst

@@ -18,13 +18,12 @@ Bug fixes
 =========
 
 * Fixed an issue where the controller stopped generating advertising reports.
-  This could happen when the controller was running an extended cooperative scanner together with other activities, such as advertising or connection,
-  while receiving data in an extended advertising event that used ``AUX_CHAIN_IND``. (DRGN-21020)
+  This could happen when the controller was running an extended cooperative scanner together with other activities, such as advertising or connection, while receiving data in an extended advertising event that used ``AUX_CHAIN_IND`` (DRGN-21020).
 * Fixed an issue where the controller would stop sending ACL data packets to the host when controller to host flow control was enabled.
   This could happen when a disconnection occurred before the host had issued the Host Number of Complete Packets command for the remaining ACL data packets.
-  Now the controller waits until after all ACL data packets have been acknowledged by the host before raising the Disconnection Complete event.
-  The controller also validates the handles provided in the Host Number of Complete Packets command. (DRGN-21085)
-* Fixed a rare issue where the scanner may assert when it schedules the reception of the next advertising packet. (DRGN-21262)
+  Now, the controller waits until all ACL data packets have been acknowledged by the host before raising the Disconnection Complete event.
+  The controller also validates the handles provided in the Host Number of Complete Packets command (DRGN-21085).
+* Fixed a rare issue where the scanner may assert when it schedules the reception of the next advertising packet (DRGN-21262).
 
 nRF Connect SDK v2.5.0
 **********************