[AppConfig] build: v1.6.0 release prep (Azure#48673)

* build: v1.6.0 release prep

* add initial release date

* fix changelog

* fix release date

Author: jorgerangel-msft

sdk/appconfiguration/Azure.Data.AppConfiguration/CHANGELOG.md

@@ -1,17 +1,11 @@
 # Release History
 
-## 1.6.0-beta.1 (Unreleased)
+## 1.6.0 (2025-03-11)
 
 ### Features Added
 
 - Added support for specifying the token credential's Microsoft Entra audience when creating a client.
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
-
 ## 1.5.0 (2024-08-06)
 
 ### Features Added

sdk/appconfiguration/Azure.Data.AppConfiguration/src/Azure.Data.AppConfiguration.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <Description>This is the Microsoft Azure Application Configuration Service client library</Description>
     <AssemblyTitle>Microsoft Azure.Data.AppConfiguration client library</AssemblyTitle>
-    <Version>1.6.0-beta.1</Version>
+    <Version>1.6.0</Version>
     <!--The ApiCompatVersion is managed automatically and should not generally be modified manually.-->
     <ApiCompatVersion>1.5.0</ApiCompatVersion>
     <PackageTags>Microsoft Azure Application Configuration;Data;AppConfig;$(PackageCommonTags)</PackageTags>