Bug: Task lists Detection - source/js/main.js

[Szhshp]

// regex error, all list item with char 'x' are detected as Todo
- '[x]'
+ '\[x\]'

// 所有 li 都被加入检测是否为 todo, 完全没有必要
- $(" ul > li")
+$(".article-entry ul > li")

[zthxxx]

Thanks, could you make a PR for this? @szhielelp