Update AUTHORS, CHANGES.md, and RELEASE_NOTES.md for ns-3.40

RELEASE_NOTES.md

@@ -13,8 +13,8 @@ a [GitLab.com issue tracker](https://gitlab.com/nsnam/ns-3-dev/-/issues) number,
 and references prefixed by '!' refer to a
 [GitLab.com merge request](https://gitlab.com/nsnam/ns-3-dev/-/merge_requests) number.
 
-Release 3-dev
--------------
+Release 3.40
+------------
 
 ### Supported platforms
 
@@ -27,29 +27,35 @@ requirements (Note: not all ns-3 features are available on all systems):
 - (macOS only) Xcode 11 or later
 - (Windows only) Msys2/MinGW64 toolchain or WSL2
 
+Python API requires [Cppyy](https://cppyy.readthedocs.io/en/latest/installation.html) and works for Linux only.  Specifically, avoid Cppyy version 3; stay with version 2.4.2 for this release.
+
 ### New user-visible features
 
 - (core) !1586 - `EmpiricalRandomVariable` CDF pairs can now be added in any order.
+- (energy) !1329 - Extensions to battery discharge module
+- (lr-wpan) !1604 - Add CapabilityField bitmap functions
+- (lr-wpan) !1645 - Add LQI to MlmeAssociateIndicationParams
 - (wifi) Added support for 802.11be TID-to-Link Mapping
-- (energy) - !1329 - Extensions to battery discharge module
-- (lr-wpan) - !1604 - Add CapabilityField bitmap functions
-- (lr-wpan) - !1645 - Add LQI to MlmeAssociateIndicationParams
 - (wifi) Added a new trace source to WifiPhy to indicate operating channel change
 - (wifi) Improved support for multiple spectrum PHY interfaces
 - (wifi) Added initial support for MU-MIMO (ideal PHY layer only)
 
 ### Bugs fixed
 
+- (antenna) #889 - Improve `WrapTo*` functions
 - (core) #922 - `EmpiricalRandomVariable` no longer requires that a CDF pair with a range value exactly equal to 1.0 be added.
-- (lr-wpan) - !1591 - Removed unnecessary Bcst filter from MAC
+- (core) #949 - Fix bound callbacks arguments type detection
+- (internet) #956 - Avoid sending RS when link goes down
+- (lr-wpan) !1591 - Removed unnecessary Bcst filter from MAC
+- (lr-wpan) #944 - Fix for-loop in PrintTxQueue(s) functions
+- (lr-wpan) - Fix incorrect return parameter in the MAC MlmeAssociateConfirm
+- (mobility) #943 - Fix node direction change when node is in a corner
 - (wifi) - Reset MU PPDU UID to prevent STA from receiving the TB PPDU sent by another STA
 - (wifi) - Fix max value for UL MCS field of User Info fields (depends on TF variant)
 - (wifi) - Update TXOP bandwidth upon every transmission
 - (wifi) - Fix flush operation on WifiMacQueues
-- (wifi) - #942 - Trace expired MPDUs before removing them from the queue to avoid blocking the recipient buffer
+- (wifi) #942 - Trace expired MPDUs before removing them from the queue to avoid blocking the recipient buffer
 - (wifi) - Fix wrong condition preventing PHY from aborting RX when starting TX
-- (lr-wpan) - #944 - Fix for-loop in PrintTxQueue(s) functions
-- (lr-wpan) - Fix incorrect return parameter in the MAC MlmeAssociateConfirm
 
 Release 3.39
 ------------