[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

CONTRIBUTING.md

@@ -273,4 +273,4 @@ Alternatively you can also contribute to Jupyter Notebook without setting up a l
 - A more advanced [github.dev](https://docs.github.com/en/codespaces/the-githubdev-web-based-editor) editor can be accessed by pressing the dot (.) key while in the Jupyter Notebook GitHub repository
 
 
-This guide is meant to help both new and experienced contributors quickly set up, test, and improve Jupyter Notebook.
+This guide is meant to help both new and experienced contributors quickly set up, test, and improve Jupyter Notebook.