remove nuget feed from EventGrid integration sample

Author: chenkennt

samples/EventGridIntegration/javascript/extensions.csproj

@@ -7,6 +7,6 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.EventGrid" Version="2.0.0" />
     <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.SignalRService" Version="1.0.1" />
-    <PackageReference Include="Microsoft.Azure.WebJobs.Script.ExtensionsMetadataGenerator" Version="1.1.0" />
+    <PackageReference Include="Microsoft.Azure.WebJobs.Script.ExtensionsMetadataGenerator" Version="1.2.1" />
   </ItemGroup>
 </Project>