Merge pull request #6 from python-jsonschema/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

Author: Julian

.pre-commit-config.yaml

@@ -9,7 +9,7 @@ repos:
     -   id: trailing-whitespace
 
 - repo: https://github.com/markdownlint/markdownlint
-  rev: v0.12.0
+  rev: v0.15.0
   hooks:
   - id: markdownlint
     args: ["-r", "~MD013"]