message: Fix section levels in README
diff: LaTeX Workshop is an extension for [Visual Studio Code](https://code.visualstudio.com/), aiming to provide core features for LaTeX typesetting with Visual Studio Code.
  -This project won't be successful without contributions from the community, especially the current and past key contributors:
  +This project won't be successful without contributions from the community, especially from the current and past key contributors:
  +
  - Jerome Lelong [`@jlelong`](https://github.com/jlelong)
  - Takashi Tamura [`@tamuratak`](https://github.com/tamuratak)
  - Tecosaur [`@tecosaur`](https://github.com/tecosaur)
  @@ -30,7 +31,7 @@ Thank you so much!
  The manual of the extension is maintained as a [wiki](https://github.com/James-Yu/LaTeX-Workshop/wiki)
  -# Table of Contents
  +### Table of Contents
  - [Home](https://github.com/James-Yu/LaTeX-Workshop/wiki/Home)
  - [Installation and basic settings](https://github.com/James-Yu/LaTeX-Workshop/wiki/Install)
  