add recomendation to use wsl 2 on windows

[yaxinr]

use of wsl 2 give x10 faster speed compilation.
many programmers hate to use emberjs because of slow compilation and recompilation on windows.

[ijlee2]

Hi, @yaxinr. Thank you for suggesting a solution to improve the developer experience of Windows users. I think it's a good idea to provide the solution in https://cli.emberjs.com/release/appendix/windows/.

I briefly looked at the StackOverflow answer. My initial impression was that the answer is a bit short and may be lacking details for people who haven't tried wsl 2 before. (I haven't used Windows in some time, so I wasn't sure if I would be able to follow the steps easily.)

What do you think about creating a pull request that updates the appendix/windows page, and provides a paragraph or two that explains what wsl 2 is and how to install it for Ember development? (A screenshot(s) is nice to have.) I think that could help us get a conversation started.

If you have questions about how we can update the appendix/windows page, feel free to let us know. Thanks again!