[pre-commit.ci] pre-commit autoupdate (#32)

updates:
- [github.com/psf/black: 21.8b0 → 21.9b0](psf/black@21.8b0...21.9b0)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -19,7 +19,7 @@ repos:
     - id: trailing-whitespace
 
   - repo: https://github.com/mgedmin/check-manifest
-    rev: "0.46"
+    rev: "0.47"
     hooks:
     - id: check-manifest
       args: [--no-build-isolation]
@@ -31,7 +31,7 @@ repos:
     - id: isort
 
   - repo: https://github.com/psf/black
-    rev: 21.8b0
+    rev: 21.9b0
     hooks:
     - id: black