Use Terminal.Gui 2.1.1-develop.125 (available on CI feed)

2.1.0 stable is not published to the PowerShellCore_PublicPackages feed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: tig

Directory.Packages.props

@@ -3,7 +3,7 @@
     <PackageVersion Include="Microsoft.PowerShell.SDK" Version="7.5.4" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageVersion Include="System.Management.Automation" Version="7.5.4" />
-    <PackageVersion Include="Terminal.Gui" Version="2.1.0" />
+    <PackageVersion Include="Terminal.Gui" Version="2.1.1-develop.125" />
     <!-- Test dependencies -->
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageVersion Include="xunit" Version="2.9.3" />