chore(ci): disable split_commits in git-cliff config

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: olivermeyer

pyproject.toml

@@ -558,7 +558,7 @@ conventional_commits = true
 # filter out the commits that are not conventional
 filter_unconventional = true
 # process each line of a commit as an individual commit
-split_commits = true
+split_commits = false
 # regex for preprocessing the commit messages
 commit_preprocessors = [
     { pattern = '\((\w+\s)?#([0-9]+)\)', replace = "([#${2}](<REPO>/pull/${2}))" },