doc: Update RELEASE_NOTES.md and CHANGES.md for ns-3.46.1

CHANGES.md

@@ -12,15 +12,12 @@ Note that users who upgrade the simulator across versions, or who work directly
 
 This file is a best-effort approach to solving this issue; we will do our best but can guarantee that there will be things that fall through the cracks, unfortunately. If you, as a user, can suggest improvements to this file based on your experience, please contribute a patch or drop us a note on ns-developers mailing list.
 
-## Changes from ns-3.46 to ns-3-dev
+## Changes from ns-3.46 to ns-3.46.1
 
-### New API
-
-### Changes to existing API
-
-### Changes to build system
-
-### Changed behavior
+The ns-3.46.1 contains some small build system fixes discovered after the ns-3.46 release, and two
+new module documentation chapters (see [RELEASE_NOTES.md](RELEASE_NOTES.md)). There are no API
+changes, changes to how the build system works, or changed behavior of the models, compared with
+the ns-3.46 release.
 
 ## Changes from ns-3.45 to ns-3.46
 

RELEASE_NOTES.md

@@ -12,7 +12,10 @@ 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 3.46.1
+
+ns-3.46.1 is a small update to ns-3.46 to fix build issues discovered after release.
+There should be no model behavior or API changes compared with ns-3.46.
 
 ### Supported platforms
 
@@ -36,8 +39,14 @@ been tested on Linux. As of this release, the latest known version to work with
 
 ### New user-visible features
 
+- (doc) New module documentation for mobility and propagation modules
+
 ### Bugs fixed
 
+- (build) The ns3 script was not compatible with Python 3.14
+- (build) A missing header include in test.cc was breaking the g++-12 build
+- (build) Fixed OpenMPI-based build on Alpine Linux
+
 ## Release 3.46
 
 This release is available from: