Update CHANGELOG.rst

Co-authored-by: Lucas McDonald <[email protected]>

Author: imabhichow

CHANGELOG.rst

@@ -8,9 +8,7 @@ Changelog
 Maintenance
 -----------
 * deps: Extend supported `MPL`_ versions to include v1.11.0
-* CI: Use Github Actions to start CodeBuild builds (#762 (https://github.com/aws/aws-encryption-sdk-python/pull/762))
-* Update SUPPORT_POLICY.rst (#756 (https://github.com/aws/aws-encryption-sdk-python/pull/756))
-* deps: bump setuptools from 66.1.1 to 70.0.0 in /dev_requirements (#712 (https://github.com/aws/aws-encryption-sdk-python/pull/712))
+    * v1.11.0 contains performance improvements for the hierarchical keyring and extends the range of supported `cryptography` versions.
 
 4.0.1 -- 2025-03-26
 ===================