Replace references to black, pyupgrade, isort, flake8 docs with Ruff (#701)

Author: hevansDev

content/contributing/process/contents.lr

@@ -103,16 +103,9 @@ with each `git` commit, run `pre-commit install`.
 
 Included Pre-commit checks:
 
-- [Black](https://black.readthedocs.io/en/stable/index.html) ensures
-  uniform code formatting
+- [Ruff](https://docs.astral.sh/ruff/) linting and code formatting
 - [docformatter](https://docformatter.readthedocs.io/en/latest/) ensures
   uniform formatting for docstrings and comments
-- [pyupgrade](https://github.com/asottile/pyupgrade) ensures code is
-  using the latest best practices for Python
-- [isort](https://pycqa.github.io/isort/) ensures uniform `import`
-  statements
-- [flake8](https://flake8.pycqa.org/en/latest/) checks for common coding
-  and syntax issues
 - Misc checks that validate structured documents such as TOML files and
   remove unnecessary whitespace