docs(kitex): document why WithMuxConnection/WithMuxTransport are deprecated#1529

DMwangnima merged 1 commit intocloudwego:maincloudwego/cloudwego.github.io:mainfrom

ChocoLZS:docs/mux-deprecatedChocoLZS/cloudwego.github.io:docs/mux-deprecatedCopy head branch name to clipboard