update: style index.html

[CooperHash]

make little change of index.html

by the way, as a someone who first open this maybe confused about "comman section" and other section, so if readme can explain it or make a docs will better

[a-wing]

CLA. please. https://github.com/binbat/live777/blob/main/.github/CLA.md#list-of-contributors

[CooperHash]

CLA. please. https://github.com/binbat/live777/blob/main/.github/CLA.md#list-of-contributors

i don't know how to sign cla

[a-wing]

Add your name, date in this file bottom

Look like this: (you commit log will confirm you identity)

    Metal A-wing, @a-wing, 2023/10/10
    Yabin Yang, @Marsyew, 2023/10/10
    Wen Yang, @fastfeee, 2023/10/10
    Hongcha Zhang, @hongcha98, 2023/10/10
    Yuanyuan Zhou, @dfasdfasddf, 2023/11/01

You best use git commit --signoff --gpg-sign use signoff and use PGP verify

If don't have PGP and signoff, Not problem, We accept normal commits

[CooperHash]

ok then