[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/asottile/pyupgrade: v2.23.1 → v2.25.0](asottile/pyupgrade@v2.23.1...v2.25.0)
- [github.com/psf/black: 21.7b0 → 21.8b0](psf/black@21.7b0...21.8b0)

.pre-commit-config.yaml

@@ -2,7 +2,7 @@ ci:
   autoupdate_schedule: monthly
 repos:
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.23.1
+    rev: v2.25.0
     hooks:
       - id: pyupgrade
         args: ["--py36-plus"]
@@ -12,7 +12,7 @@ repos:
       - id: reorder-python-imports
         args: ["--application-directories", "src"]
   - repo: https://github.com/psf/black
-    rev: 21.7b0
+    rev: 21.8b0
     hooks:
       - id: black
   - repo: https://github.com/PyCQA/flake8