fix: patterns is a list of strings, not a single string

Author: jenstroeger

.github/dependabot.yaml

@@ -48,7 +48,7 @@ updates:
   # https://docs.github.com/en/code-security/dependabot/working-with-dependabot/dependabot-options-reference#groups--
   groups:
     pre-commit:
-      patterns: '*'
+      patterns: ['*']
   # Add additional reviewers for PRs opened by Dependabot. For more information, see:
   # https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#reviewers
   # reviewers: