[Personalizer] Update package version and add changelog entries (#22961)

Co-authored-by: orenmichaely <73134189+ormichae@users.noreply.github.com>

Author: orenmichaely

sdk/personalizer/Azure.AI.Personalizer/CHANGELOG.md

@@ -1,6 +1,17 @@
 # Release History
 
-## 1.1.0-beta.1 (Unreleased)
+## 2.0.0-beta.1 (2021-08-10)
 
-### Added
-- Initial release of Azure AI [Personalizer cognitive service](https://docs.microsoft.com/azure/cognitive-services/personalizer/) SDK
+### Features Added
+- Initial Release of Azure AI [Personalizer cognitive service](https://docs.microsoft.com/azure/cognitive-services/personalizer/) version 2.0.0-beta.1 SDK.
+- This is a new release of the Azure AI Personalizer SDK that follows the Azure SDK guidelines, so the structure is a little different from the old SDK.
+- [Multi-Slot personalization](https://docs.microsoft.com/azure/cognitive-services/personalizer/how-to-multi-slot?pivots=programming-language-csharp)
+- [Personalizer Automatic Optimization](https://docs.microsoft.com/azure/cognitive-services/personalizer/concept-auto-optimization)
+- Support Azure Active Directory Authentication.
+- New overloads for `Rank`, `Reward` and the `PersonalizerClient` constructor.
+
+### Breaking Changes
+- `PersonalizerClient` contains (single and multi-slot) Rank / Reward / Activate functionality.
+- All other functionality (ServiceConfiguration, Evaluations, Policy, Model, Log) was moved to `PersonalizerAdministrationClient`.
+- All methods are exposed in their top level client. For example `PersonalizerClient.Events.Reward` is now `PersonalizerClient.Reward`.
+- Changed method names and signatures to follow Azure SDK guidelines.

sdk/personalizer/Azure.AI.Personalizer/src/Azure.AI.Personalizer.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <AssemblyTitle>Microsoft Azure.AI.Personalizer client library</AssemblyTitle>
-    <Version>1.1.0-beta.1</Version>
+    <Version>2.0.0-beta.1</Version>
     <Description>
       This is the Azure Personalizer client library for developing .NET applications.
     </Description>