Fix the path folder separator with unit style.

nuget.config

@@ -9,7 +9,7 @@
     <!--To inherit the global NuGet package sources remove the <clear/> line below -->
     <clear />
     <add key="nuget" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
-    <add key="LocalPackages" value="Terminal.Gui\bin\Release" />
+    <add key="LocalPackages" value="Terminal.Gui/bin/Release" />
   </packageSources>
   <packageSourceMapping>
     <packageSource key="nuget">