Error correcting of index_zh.html, and ask for adding describe-texts of advanced settings

[HackYardo]

Many BadukAI users in China ask each other what are the ranges of advanced settings.

• analysisWideRootNoise == 0.04

  0 to 1

• resignThreshold == -0.90

  [-1,1]

• playoutDoublingAdvantage = 0.0

  -3.0 to 3.0

From: https://github.com/lightvector/KataGo/blob/master/cpp/configs/gtp_example.cfg