[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/pre-commit/mirrors-prettier: v2.3.0 → v2.3.1](pre-commit/mirrors-prettier@v2.3.0...v2.3.1)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -15,7 +15,7 @@ repos:
       - id: trailing-whitespace
       - id: end-of-file-fixer
   - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: "v2.3.0"
+    rev: "v2.3.1"
     hooks:
       - id: prettier
         types: [file]