Remove black session from contributing

Author: staticdev

CONTRIBUTING.rst

@@ -107,16 +107,15 @@ Your pull request needs to meet the following guidelines for acceptance:
 
 Feel free to submit early, though—we can always iterate on this.
 
-You can ensure that your changes adhere to the code style by reformatting with Black_:
+To run linting and code formatting checks before commiting your change, you can install pre-commit as a Git hook by running the following command:
 
 .. code:: console
 
-   $ nox --session=black
+    $ nox --session=pre-commit -- install
 
 It is recommended to open an issue before starting work on anything.
 This will allow a chance to talk it over with the owners and validate your approach.
 
 .. _pull request: https://github.com/staticdev/django-sorting-bootstrap/pulls
-.. _Black: https://black.readthedocs.io/
 .. github-only
 .. _Code of Conduct: CODE_OF_CONDUCT.rst