[pre-commit.ci] pre-commit autoupdate (#980)

updates:
- [github.com/asottile/pyupgrade: v2.29.1 → v2.31.0](asottile/pyupgrade@v2.29.1...v2.31.0)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -14,7 +14,7 @@ repos:
   - id: trailing-whitespace
 
 - repo: https://github.com/asottile/pyupgrade
-  rev: v2.29.1
+  rev: v2.31.0
   hooks:
   - id: pyupgrade
     name: PyUpgrade 3.6+