Update sample appsettings for Logging

[tracyboehrer]

Outdated namespace Microsoft.Copilot:

"Logging": {
   "LogLevel": {
     "Default": "Warning",
     "Microsoft.Copilot": "Warning",
     "Microsoft.Hosting.Lifetime": "Information"
   }
}

[rido-min]

This reminds me we should have a doc describing all log categories, and probably examples of produced for different log categories (same for all languages)