[pre-commit.ci] pre-commit autoupdate (#462)

updates:
- [github.com/asottile/pyupgrade: v3.20.0 → v3.21.0](asottile/pyupgrade@v3.20.0...v3.21.0)

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

@@ -13,7 +13,7 @@ repos:
     hooks:
       - id: black
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.20.0
+    rev: v3.21.0
     hooks:
       - id: pyupgrade
         args: [ --py39-plus ]