Add changelog and bump version to 3.2.1 (#1864)

Signed-off-by: Jean-Christophe Morin <jean_christophe_morin@hotmail.com>

CHANGELOG.md

@@ -2,6 +2,15 @@
 
 <!-- start-here-sphinx-start-after -->
 
+## v3.2.1 (2024-10-27)
+[Source](https://github.com/AcademySoftwareFoundation/rez/tree/3.2.1) | [Diff](https://github.com/AcademySoftwareFoundation/rez/compare/v3.2.0...3.2.1)
+
+### Fixes
+
+- Fix key error on getting the "testing" key on older contexts [\#1863](https://github.com/AcademySoftwareFoundation/rez/pull/1863) ([JeanChristopheMorinPerso](https://github.com/JeanChristopheMorinPerso))
+
+  This will fix issues where contexts created from rez less than 3.2.0 would fail to be loaded in 3.2+.
+
 ## v3.2.0 (2024-10-20)
 [Source](https://github.com/AcademySoftwareFoundation/rez/tree/3.2.0) | [Diff](https://github.com/AcademySoftwareFoundation/rez/compare/3.1.1...3.2.0)
 

src/rez/utils/_version.py

@@ -4,4 +4,4 @@
 
 # Update this value to version up Rez. Do not place anything else in this file.
 # Using .devN allows us to run becnmarks and create proper benchmark reports on PRs.
-_rez_version = "3.2.0"
+_rez_version = "3.2.1"