[pre-commit.ci] pre-commit autoupdate

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

.pre-commit-config.yaml

@@ -10,7 +10,7 @@ repos:
   - id: check-added-large-files
 
 - repo: https://github.com/psf/black
-  rev: "21.7b0"
+  rev: "21.8b0"
   hooks:
   - id: black
 
@@ -32,7 +32,7 @@ repos:
     additional_dependencies: ["types-requests", "types-docutils"]
 
 - repo: https://github.com/asottile/pyupgrade
-  rev: "v2.24.0"
+  rev: "v2.25.0"
   hooks:
   - id: pyupgrade