update nuget config (#156)

Author: awentzel

nuget.config

@@ -4,6 +4,7 @@
      <trustedSigners>
        <repository name="nuget.org" serviceIndex="https://api.nuget.org/v3/index.json">
             <certificate fingerprint="72A23807230618030B3CFC200845CE317AD849BCDB7E1DD0CEDC018A68EFEEE0" hashAlgorithm="SHA256" allowUntrustedRoot="false" />
+            <certificate fingerprint="F868853A2348B82A9ED4EAF5F7BBB2C901BAECA0E9EC8BAC238CE74624BAC74B" hashAlgorithm="SHA256" allowUntrustedRoot="false" />
             <owners>microsoft;fast</owners>
        </repository>
      </trustedSigners>
@@ -12,3 +13,4 @@
         <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
    </packageSources>
 </Configuration>
+