Simplify Python 3.15 changelog entries

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 94b181dc-bdd7-4d3c-825e-96264b026c85

Author: Bernd Verst

CHANGELOG.md

@@ -9,7 +9,7 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ADDED
 
-- Added Python 3.15 support. Python 3.10 remains supported.
+- Added Python 3.15 support.
 
 FIXED
 

durabletask-azuremanaged/CHANGELOG.md

@@ -9,7 +9,7 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ADDED
 
-- Added Python 3.15 support. Python 3.10 remains supported.
+- Added Python 3.15 support.
 
 FIXED