Update AVA Management SDK to use beta instead of preview in version (Azure#21122)

* Update AMS Management SDK to use beta instead of preview

* Update csproj to use beta instead of preview

Author: giakas

sdk/videoanalyzer/Microsoft.Azure.Management.VideoAnalyzer/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Microsoft.Azure.Management.VideoAnalyzer release notes
 
-## Changes in 1.0.0-preview.1
+## Changes in 1.0.0-beta.1
 
 This SDK is using 2021-05-01-preview version of the Azure Video Analyzer API
 

sdk/videoanalyzer/Microsoft.Azure.Management.VideoAnalyzer/src/Microsoft.Azure.Management.VideoAnalyzer.csproj

@@ -6,7 +6,7 @@
   <PropertyGroup>
     <PackageId>Microsoft.Azure.Management.VideoAnalyzer</PackageId>
     <Description>Provides developers with libraries for managing Azure Video Analyzer using the Azure Resource Manager API.</Description>
-    <Version>1.0.0-preview.1</Version>
+    <Version>1.0.0-beta.1</Version>
     <AssemblyName>Microsoft.Azure.Management.VideoAnalyzer</AssemblyName>
     <PackageTags>management;media;VideoAnalyzer;Video Analyzer</PackageTags>
     <PackageReleaseNotes>