Fix toc for the webpage of the chapter of computational complexity

[nidhoggfgg]

fix the math formula in TOC

before:

after:

fix both in English and Chinese chapter

[krahets]

Thanks for the PR!

I'm seeking a more elegant way to solve the latex rendering issue in the toc. Do you know how to solve this without adding the extra data-toc-label?

[nidhoggfgg]

this is a problem with python-mardown used by mkdocs, related issues #849, #699

except data-toc-label, maybe you need to do more work, like writing extensions, ig
and ASAIK there is no perfect solution yet

here are two more possible solutions (maybe not that good):

1.use javaScript

write these codes to overrides/javascripts, tested and they works

document$.subscribe(function () {
  document.querySelectorAll('.md-nav__link').forEach(function (link) {
    // only remove the extra charcters when the toc contains sth like O(n) or O(\log n)
    if (link.innerHTML.includes('O(')) {
      link.innerHTML = link.innerHTML.replace(/\\\(/g, '').replace(/\\\)/g, '').replace(/\\/g, '');
    }
  });
});

2.programming a extension

lol, remove those \ or try to render them in nav, it's up to you

btw, in this pr i forgot the space in 平方阶 O(n^2), sry for that