Upgrade .NET SDK in Azure DevOps to 10.0.301, apache#1322 (apache#1327)

Author: paulirwin

azure-pipelines.yml

@@ -57,7 +57,7 @@ variables:
 - name: BuildCounter
   value: $[counter(variables['VersionSuffix'],coalesce(variables['BuildCounterSeed'], 1250))]
 - name: DotNetSDKVersion
-  value: '10.0.100'
+  value: '10.0.301'
 - name: DocumentationArtifactName
   value: 'docs'
 - name: DocumentationArtifactZipFileName