message: fix typo, duplicate preposition
diff: </p>
  # Rome is currently being rewritten in Rust. Read more about it in our [latest blog post](https://rome.tools/blog/2021/09/21/rome-will-be-rewritten-in-rust.html).
  -# The documentation below is is out of date and available for posterity.
  +# The documentation below is out of date and available for posterity.
  <!-- This intro is synced with the website via the `./rome run scripts/generate-files/website-intro` script. Make sure you run it after modifying anything between these comments. -->
  <!-- INTRO START -->
  