pre-commit: bump repositories

updates:
- [github.com/asottile/pyupgrade: v2.31.0 → v2.31.1](asottile/pyupgrade@v2.31.0...v2.31.1)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -18,7 +18,7 @@ repos:
   - id: trailing-whitespace
   - id: double-quote-string-fixer
 - repo: https://github.com/asottile/pyupgrade
-  rev: v2.31.0
+  rev: v2.31.1
   hooks:
   - id: pyupgrade
     args: ["--py36-plus"]