[pre-commit.ci] pre-commit autoupdate (#6039)

updates:
- [github.com/asottile/pyupgrade: v2.28.0 → v2.29.0](asottile/pyupgrade@v2.28.0...v2.29.0)

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

.pre-commit-config.yaml

@@ -60,7 +60,7 @@ repos:
   - id: detect-private-key
     exclude: ^examples/
 - repo: https://github.com/asottile/pyupgrade
-  rev: 'v2.28.0'
+  rev: 'v2.29.0'
   hooks:
   - id: pyupgrade
     args: ['--py36-plus']