[pre-commit.ci] pre-commit autoupdate (#810)

updates:
- [github.com/asottile/pyupgrade: v2.24.0 → v2.25.0](https://github.com/asottile/pyupgrade/compare/v2.24.0...v2.25.0)
- [github.com/psf/black: 21.7b0 → 21.8b0](https://github.com/psf/black/compare/21.7b0...21.8b0)

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

.pre-commit-config.yaml

@@ -14,7 +14,7 @@ repos:
   - id: trailing-whitespace
 
 - repo: https://github.com/asottile/pyupgrade
-  rev: v2.24.0
+  rev: v2.25.0
   hooks:
   - id: pyupgrade
     name: PyUpgrade 3.6+
@@ -31,7 +31,7 @@ repos:
   - id: isort
 
 - repo: https://github.com/psf/black
-  rev: 21.7b0
+  rev: 21.8b0
   hooks:
   - id: black