[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/pre-commit/mirrors-prettier: v2.5.1 → v4.0.0-alpha.8](pre-commit/mirrors-prettier@v2.5.1...v4.0.0-alpha.8)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: 'v2.5.1'
+    rev: 'v4.0.0-alpha.8'
     hooks:
       - id: prettier
         language_version: system