Increment version for attestation releases (Azure#20932)

Increment package version after release of Azure.Security.Attestation

Author: azure-sdk

sdk/attestation/Azure.Security.Attestation/CHANGELOG.md

@@ -1,5 +1,8 @@
 # Release History
 
+## 1.1.0-beta.1 (Unreleased)
+
+
 ## 1.0.0 (2021-05-11)
 
 ### Changed

sdk/attestation/Azure.Security.Attestation/src/Azure.Security.Attestation.csproj

@@ -2,7 +2,9 @@
   <PropertyGroup>
     <Description>This is the project which implements the Microsoft Azure Attestation client API and package</Description>
     <AssemblyTitle>Azure SDK Template</AssemblyTitle>
-    <Version>1.0.0</Version>
+    <Version>1.1.0-beta.1</Version>
+    <!--The ApiCompatVersion is managed automatically and should not generally be modified manually.-->
+    <ApiCompatVersion>1.0.0</ApiCompatVersion>
     <PackageTags>Azure Template</PackageTags>
     <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
   </PropertyGroup>