Update local-feed path in nuget.config for CI compatibility

Author: sylvain-guillet

IO.Astrodynamics.Net/IO.Astrodynamics.SmokeTests/nuget.config

@@ -3,14 +3,12 @@
   <packageSources>
     <!--
       Clear inherited sources so only these two are used.
-      "local-feed" is populated by CI (dotnet pack output) and may
-      not exist locally – NuGet tolerates a missing directory when
-      the source is declared here but will fail when passed via
-      the - -source CLI flag on Windows (NU1301).
+      "local-feed" is populated by CI (dotnet pack output via cd.yml)
+      and points to IO.Astrodynamics.Net/local-feed (one level up).
     -->
     <clear />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
-    <add key="local-feed" value="../../../local-feed" />
+    <add key="local-feed" value="../local-feed" />
   </packageSources>
 </configuration>