message: docs: Fix incorrect heading
diff: @@ -38,7 +38,7 @@ A cross-platform graphical process/system monitor with a customizable interface
  - [Features](#features)
  - [Processes](#processes)
  - [Process searching](#process-searching)
  - - [Sorting](#process-sorting)
  + - [Process sorting](#process-sorting)
  - [Zoom](#zoom)
  - [Expanding](#expanding)
  - [Basic mode](#basic-mode)
  @@ -343,13 +343,13 @@ As yet _another_ process/system visualization and management application, bottom
  - Display information regarding processes, like CPU, memory, I/O usage, and process state
  -- Process management (process killing _is_ all you need, right?)
  +- Process management (well, if process killing is all you need)
  It also aims to be:
  - Lightweight
  -- Cross-platform - supports Linux, Windows, and macOS
  +- Cross-platform - supports 64-bit Linux, Windows, and macOS
  In addition, bottom also currently has the following features:
  @@ -612,7 +612,7 @@ Thanks to all contributors ([emoji key](https://allcontributors.org/docs/en/emoj
  - Basic mode is heavily inspired by [htop's](https://hisham.hm/htop/) design.
  - This application was written with many, _many_ libraries, and built on the
  - work of many talented people. This application would be impossible
  - without their work.
  + work of many talented people. This application would be impossible without their
  + work. I used to thank them all individually but the list got too large...
  - And of course, thanks to all contributors!
  