Increment version for servicebus releases (Azure#25184)

Increment package version after release of Microsoft.Azure.ServiceBus

Author: azure-sdk

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

@@ -1,5 +1,15 @@
 # Release History
 
+## 5.3.0-beta.1 (Unreleased)
+
+### Features Added
+
+### Breaking Changes
+
+### Bugs Fixed
+
+### Other Changes
+
 ## 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)

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

@@ -2,8 +2,9 @@
   <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>5.2.0</Version>
-    <ApiCompatVersion>5.1.2</ApiCompatVersion>
+    <Version>5.3.0-beta.1</Version>
+    <!--The ApiCompatVersion is managed automatically and should not generally be modified manually.-->
+    <ApiCompatVersion>5.2.0</ApiCompatVersion>
     <PackageTags>Microsoft;Azure;Service Bus;ServiceBus;.NET;AMQP;IoT;Queue;Topic</PackageTags>
     <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
     <NoWarn>$(NoWarn);CS1591;CS1573;NU5125</NoWarn>