[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/pre-commit/mirrors-prettier: v3.0.0-alpha.4 → v3.0.0-alpha.6](pre-commit/mirrors-prettier@v3.0.0-alpha.4...v3.0.0-alpha.6)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -37,6 +37,6 @@ repos:
         id: black
         args: ["--line-length", "79"]
   - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: "v3.0.0-alpha.4"
+    rev: "v3.0.0-alpha.6"
     hooks:
       - id: prettier