Update readme_cn.md misspelling (#2088)

learningpro

2024-09-20 8c88d71f34ddf78588983538f887b8fb483996cd

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gmail    g mail
gmail
nvidia    n vidia
nvidia
outlook
hotmail
yahoo
aol
gmx
msn
live
yandex
orange
wanadoo
web
comcast
bbc