[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/keewis/blackdoc: v0.4.1 → v0.4.2](keewis/blackdoc@v0.4.1...v0.4.2)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -14,7 +14,7 @@ repos:
       - id: black
 
   - repo: https://github.com/keewis/blackdoc
-    rev: v0.4.1
+    rev: v0.4.2
     hooks:
       - id: blackdoc