updated analyzer nuget source

NuGet.Config

@@ -26,7 +26,7 @@
     <add key="dotnet.myget.org devcore" value="https://www.myget.org/F/vs-devcore/api/v3/index.json" />
     <add key="dotnet.myget.org roslyn-tools" value = "https://dotnet.myget.org/F/roslyn-tools/api/v3/index.json" />
     <add key="dotnet.myget.org roslyn" value="https://dotnet.myget.org/F/roslyn/api/v3/index.json" />
-    <add key="dotnet.myget.org roslyn analyzers" value="https://dotnet.myget.org/F/roslyn-analyzers/api/v2/package" />
+    <add key="dotnet.myget.org roslyn analyzers" value="https://dotnet.myget.org/F/roslyn-analyzers/api/v3/index.json" />
     <add key="myget.org vs-editor" value="https://myget.org/F/vs-editor/api/v3/index.json" />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
   </packageSources>