Add changelog for releasing SDK 5.2.0 (Azure#25171)

* Add more explanation in SessionHandlerOptions

* add more description in SessionHandlerOptions

* address PR comments to add more detailed explanations

* minor

* add changelog for a new nuget minor version bump

* Revert "add changelog for a new nuget minor version bump"

This reverts commit 7ece7b5.

* add change log for amqp lib update

* try to run failed tests

* add changelog and update SDK version

* merge conflict

* nit

Author: DorothySun216

sdk/servicebus/Microsoft.Azure.ServiceBus/CHANGELOG.md

@@ -1,5 +1,9 @@
 # Release History
 
+## 5.2.0 (2021-11-05)
+- Adding MessageState property to SystemProperties [PR 25158](https://github.com/Azure/azure-sdk-for-net/pull/25158)
+- Allow receiving empty string session id sessions [PR 24570](https://github.com/Azure/azure-sdk-for-net/pull/24570)
+
 ## 5.1.3 (2021-04-15)
 
 Update package description to include pointer to the new Azure.Messaging.ServiceBus package and the migration guide.

sdk/servicebus/Microsoft.Azure.ServiceBus/src/Microsoft.Azure.ServiceBus.csproj

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <AssemblyTitle>Azure ServiceBus SDK</AssemblyTitle>
     <Description>Please note, a newer package Azure.Messaging.ServiceBus is available as of November 2020. While this package will continue to receive critical bug fixes, we strongly encourage you to upgrade. Read the migration guide at https://aka.ms/azsdk/net/migrate/sb for more details.</Description>
-    <Version>5.1.3</Version>
+    <Version>5.2.0</Version>
     <ApiCompatVersion>5.1.2</ApiCompatVersion>
     <PackageTags>Microsoft;Azure;Service Bus;ServiceBus;.NET;AMQP;IoT;Queue;Topic</PackageTags>
     <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>