Fix a wrong slnf path

Author: carlossanlop

src/Tasks/Microsoft.NET.slnf

@@ -12,7 +12,7 @@
       "src\\Compatibility\\ApiCompat\\Microsoft.DotNet.ApiCompat.Tool\\Microsoft.DotNet.ApiCompat.Tool.csproj",
       "src\\Compatibility\\ApiCompat\\Microsoft.DotNet.ApiCompatibility\\Microsoft.DotNet.ApiCompatibility.csproj",
       "src\\Compatibility\\ApiCompat\\Microsoft.DotNet.PackageValidation\\Microsoft.DotNet.PackageValidation.csproj",
-      "src\\Microsoft.DotNet.ApiSymbolExtensions\\Microsoft.DotNet.ApiSymbolExtensions.csproj",
+      "src\\Compatibility\\Microsoft.DotNet.ApiSymbolExtensions\\Microsoft.DotNet.ApiSymbolExtensions.csproj",
       "src\\Microsoft.DotNet.TemplateLocator\\Microsoft.DotNet.TemplateLocator.csproj",
       "src\\Microsoft.Win32.Msi\\Microsoft.Win32.Msi.csproj",
       "src\\Resolvers\\Microsoft.DotNet.MSBuildSdkResolver\\Microsoft.DotNet.MSBuildSdkResolver.csproj",