Release 0.11.21.

PiperOrigin-RevId: 792272070

Author: cpgaffney1

checkpoint/CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.11.21] - 2025-08-07
+
 ### Fixed
 
 - Fix incorrectly specified timeouts waiting for signals in background threads. Decrease timeout to 60s.

checkpoint/orbax/checkpoint/version.py

@@ -17,7 +17,7 @@
 # A new PyPI release will be pushed everytime `__version__` is increased.
 # Also modify version and date in CHANGELOG.
 # LINT.IfChange
-__version__ = '0.11.20'
+__version__ = '0.11.21'
 # LINT.ThenChange(//depot//orbax/checkpoint/CHANGELOG.md)