Mention Ruff in the readme. Get rid of flake8 and isort mentions.

Author: jerry-git

README.md

@@ -133,7 +133,7 @@ Find the draft release from the
 
 ### Pre-commit
 
-Pre-commit hooks run all the auto-formatters (e.g. `black`, `isort`), linters (e.g. `mypy`, `flake8`), and other quality
+Pre-commit hooks run all the auto-formatters (e.g. `black`), linters (e.g. `mypy`, `ruff`), and other quality
  checks to make sure the changeset is in good shape before a commit/push happens.
 
 You can install the hooks with (runs for each commit):