docs: fix 08-connector index.md

[wqliceman]

几处字体加粗存在空格错误，导致view时显示异常

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
11 out of 16 committers have signed the CLA.

:white_check_mark: feici02
:white_check_mark: LiShunGang
:white_check_mark: hjxilinx
:white_check_mark: wangmm0220
:white_check_mark: DuanKuanJun
:white_check_mark: hzcheng
:white_check_mark: xiaopingcs
:white_check_mark: wqliceman
:white_check_mark: dapan1121
:white_check_mark: kailixu
:white_check_mark: yihaoDeng
:x: zhengqin.song
:x: liuyq-617
:x: gccgdb1234
:x: jiajingbin
:x: huskar-t

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[guanshengliang]

很久没有看 github 仓库，今天注意到您的这个 PR。 由于时间较长，这段时间的分支变化导致出现了代码冲突。我 cherry pick 您的 commit (0a97e17cdefbe7d68d2c72b086de75ded1fecf26)，重新提了 PR(https://github.com/taosdata/TDengine/pull/28572) 且已经合并。 因此关闭当前 PR。

非常感谢您的贡献