fix: re-enable NuGet publishing after repo secret setup

Restore ENABLE_NUGET default to true now that NUGET_API_KEY is provided at repository scope, allowing release-nuget to access credentials without environment coupling.

Made-with: Cursor

Author: Hongwei-MB

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ env:
   DOTNET_CLI_TELEMETRY_OPTOUT: true
   NUKE_TELEMETRY_OPTOUT: true
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
-  ENABLE_NUGET: 'false'
+  ENABLE_NUGET: 'true'
   NUGET_USE_OIDC: 'false'
   ENABLE_INSTALLERS: 'true'
   ENABLE_ANDROID: 'false'