message: fix: add coverage to readme
diff: @@ -9,10 +9,10 @@ Discordeno follows [semantic versioning](https://semver.org/)
  [![Discord](https://img.shields.io/discord/785384884197392384?color=7289da&logo=discord&logoColor=dark)](https://discord.com/invite/5vBgXk3UcZ)
  ![Test](https://github.com/discordeno/discordeno/workflows/Test/badge.svg)
  -<!--
  -TODO: add coverage back when it is stable
  +
  +<!-- TODO: add coverage back when it is stable -->
  [![Coverage](https://img.shields.io/codecov/c/gh/discordeno/discordeno)](https://codecov.io/gh/discordeno/discordeno)
  --->
  +
  ## Features
  