Add clipboard support guide for WSL2 (#167)

To support Windows system clipboard in neovim on WSL2

README.md

@@ -61,6 +61,17 @@ $HOME/.config/nvim/vimscript/nv-vscode/init.vim
     ```bash
     sudo pacman -S xsel
     ```
+    
+- WSL2
+
+    Make sure ~/bin is in your path in this case.
+    
+    ```bash
+    curl -sLo/tmp/win32yank.zip https://github.com/equalsraf/win32yank/releases/download/v0.0.4/win32yank-x64.zip
+    unzip -p /tmp/win32yank.zip win32yank.exe > /tmp/win32yank.exe
+    chmod +x /tmp/win32yank.exe
+    mv /tmp/win32yank.exe ~/bin
+    ```
 
 ## LSP