message: Add searchNuGetOrgSymbolServer documentation
diff: @@ -259,6 +259,7 @@ The `symbolOptions` element allows customization of how the debugger searches fo
  "https://my-companies-symbols-server"
  ],
  "searchMicrosoftSymbolServer": true,
  + "searchNuGetOrgSymbolServer": true,
  "cachePath": "/symcache",
  "moduleFilter": {
  "mode": "loadAllButExcluded",
  @@ -273,6 +274,8 @@ The `symbolOptions` element allows customization of how the debugger searches fo
  **searchMicrosoftSymbolServer**: If `true` the Microsoft Symbol server (https://msdl.microsoft.com/download/symbols) is added to the symbols search path. If unspecified, this option defaults to `false`.
  +**searchNuGetOrgSymbolServer**: If `true` the Nuget.org Symbol server (https://symbols.nuget.org/download/symbols) is added to the symbols search path. If unspecified, this option defaults to `false`.
  +
  **cachePath**": Directory where symbols downloaded from symbol servers should be cached. If unspecified, on Windows the debugger will default to %TEMP%\\SymbolCache, and on Linux and macOS the debugger will default to ~/.dotnet/symbolcache.
  **moduleFilter.mode**: This value is either `"loadAllButExcluded"` or `"loadOnlyIncluded"`. In `"loadAllButExcluded"` mode, the debugger loads symbols for all modules unless the module is in the 'excludedModules' array. In `"loadOnlyIncluded"` mode, the debugger will not attempt to load symbols for ANY module unless it is in the 'includedModules' array, or it is included through the 'includeSymbolsNextToModules' setting.
  