Release notes: fix typo

docs/changelogs/v4.0.0.md

@@ -3,7 +3,7 @@ Pull request to merge `dev` into `main` for release version 4.0.0
 
 See the milestone and project pages for additional information
 
-    https://github.com/OpenFAST/openfast/milestone/15
+    https://github.com/OpenFAST/openfast/milestone/3
 
 Test results, if applicable
 See GitHub Actions
@@ -234,7 +234,7 @@ _AeroDisk_ is a new module for a disk actuator aerodynamic module.  This module
 
 
 
-### AeroDyn (15)
+### AeroDyn
 _AeroDyn_ improvements include a new input file, nacelle drag, visualization improvements, unsteady aero for tailfins, multi-rotor support in the driver and interface library, a simple ground effect model for _OLAF_ wakes, using _InflowWind_ pointers for data acces, and many bug fixes.  With the removal of _AeroDyn14_, _AeroDyn15_ is now simply referred to as _AeroDyn_ in the input files and code (documentation may not be fully updated).
 * Input file changes
 * Driver input file changes
@@ -476,7 +476,7 @@ The _SeaState_ module contains all the wave dynamics previously included within
 * New input file
 
 #970  Initial split of HydroDyn into HydroDyn+SeaState (@HaymanConsulting)
- - #1008 supercedes this, but GitHub does not show the full history so this is listed here for completeness (#970 was merged through #1008)
+ - PR 1008 supercedes this, but GitHub does not show the full history so this is listed here for completeness (PR 970 was merged through PR 1008)
 
 #1008 Additional features for the new SeaState module and HydroDyn (@HaymanConsulting, @bjonkman, @luwang00)