Prepare azure-postgresql-auth 1.1.0 for release (#48762)

Bump the package version to 1.1.0 and stamp the CHANGELOG's Unreleased
section with the 2026-08-26 release date. The minor bump reflects the new
public `create_asyncpg_engine` API added since 1.0.2.

Co-authored-by: Matthew Boentoro <mboentoro@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 3 people

sdk/postgresql/azure-postgresql-auth/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Release History
 
-## Unreleased
+## 1.1.0 (2026-08-26)
 
 ### Features Added
 

sdk/postgresql/azure-postgresql-auth/azure_postgresql_auth/_version.py

@@ -4,4 +4,4 @@
 # license information.
 # --------------------------------------------------------------------------
 
-VERSION = "1.0.2"
+VERSION = "1.1.0"