Clarify nuget/mono isn't supported and never was on Unixy platforms. (#3335)

* Update NuGet-FAQ.yml

* Update docs/resources/NuGet-FAQ.yml

Co-authored-by: Jean-Pierre Briedé <[email protected]>

---------

Co-authored-by: Jean-Pierre Briedé <[email protected]>

Author: JonDouglas

docs/resources/NuGet-FAQ.yml

@@ -23,11 +23,9 @@ sections:
       - question: |
           Does NuGet support Mono?
         answer: |
-          The command-line tool, `nuget.exe`, builds and runs under Mono 3.2+ and can create packages in Mono.
-          
-          Although `nuget.exe` works fully on Windows, there are known issues on Linux and OS X. Refer to [Mono issues](https://github.com/NuGet/Home/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aopen+mono) on GitHub.
-          
-          A [graphical client](https://github.com/mrward/monodevelop-nuget-addin) is available as an add-in for MonoDevelop.
+          The command-line tool, `nuget.exe`, builds and runs typically under Windows. NuGet can run on Unix operating systems using `mono`, but it is not officially supported by [NuGet's Support Policy](https://devblogs.microsoft.com/nuget/announcing-nuget-exe-and-nuget-client-sdk-packages-support-policy-keeping-you-informed-and-secure/).
+
+          [Mono has transferred ownership to Wine and is no longer maintained by Microsoft](https://github.com/mono/mono/issues/21796).
           
       - question: |
           How can I determine what a package contains and whether it's stable and useful for my application?