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

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

Author: pre-commit-ci[bot]

docs/reference/changelog.md

@@ -5,7 +5,7 @@ This document outlines the list of changes to ridgeplot between each release. Fo
 Unreleased changes
 -------------------
 
-## CI/CD 
+## CI/CD
 
 - Bump actions/download-artifact from 5 to 6 ({gh-pr}`354`)