Increment version for textanalytics releases (Azure#17096)

Increment package version after release of Azure.AI.TextAnalytics

Author: azure-sdk

sdk/textanalytics/Azure.AI.TextAnalytics/CHANGELOG.md

@@ -1,5 +1,8 @@
 # Release History
 
+## 5.1.0-beta.4 (Unreleased)
+
+
 ## 5.1.0-beta.3 (2020-11-19)
 ### New Features
 - Added `HealthcareOperation` long running operation for new asynchronous `Text Analytics for health` hosted API with support for batch processing. Note this is a currently in a gated preview where AAD is not supported. More information [here](https://docs.microsoft.com/azure/cognitive-services/text-analytics/how-tos/text-analytics-for-health?tabs=ner#request-access-to-the-public-preview).

sdk/textanalytics/Azure.AI.TextAnalytics/src/Azure.AI.TextAnalytics.csproj

@@ -1,8 +1,8 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Azure Cognitive Services Text Analytics is a cloud service that provides advanced natural language processing over raw text, and features like Language Detection, Sentiment Analysis, Key Phrase Extraction, Named Entity Recognition, and Linked Entity Recognition.</Description>
     <AssemblyTitle>Microsoft Azure.AI.TextAnalytics client library</AssemblyTitle>
-    <Version>5.1.0-beta.3</Version>
+    <Version>5.1.0-beta.4</Version>
     <ApiCompatVersion>5.0.0</ApiCompatVersion>
     <PackageTags>Microsoft Azure Text Analytics</PackageTags>
     <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>