[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/pre-commit/mirrors-prettier: f12edd9 → v4.0.0-alpha.8](pre-commit/mirrors-prettier@f12edd9...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: 'f12edd9'  # Use the sha / tag you want to point at
+  rev: 'v4.0.0-alpha.8'  # Use the sha / tag you want to point at
   hooks:
   - id: prettier
     types_or: [css, javascript]