Update fxckGFW.md

[ryosukeeeeee]

@leyouyuan I'll close this pull request because clash-for-windows-bin is proprietary software and there are good free software in its class.

[leyouyuan]

so I will run the command "sudo pacman -R clash-for-windows-bin"

[ghost]

@leyouyuan I'll close this pull request because clash-for-windows-bin is proprietary software and there are good free software in its class.

But according to my tests, using the TUN mode of Clash for Windows makes https://crypto.cloudflare.com/cdn-cgi/trace SNI=encrypted, while other proxy software seems to break the ECH state(SNI=plaintext) Although ECH is not widely used at present, this issue is still hot and worth discussing.