Fix folder for CI.

nuget.config

@@ -10,7 +10,7 @@
     <clear />
     <add key="nuget" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
     <add key="LocalPackages" value="Terminal.Gui\bin\Release" />
-    <add key="local_packages" value="Terminal.Gui" />
+    <add key="local_packages" value="Terminal.Gui\local_packages" />
   </packageSources>
   <packageSourceMapping>
     <packageSource key="nuget">