[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/asottile/pyupgrade: v2.23.3 → v2.26.0](asottile/pyupgrade@v2.23.3...v2.26.0)
- [github.com/asottile/blacken-docs: v1.10.0 → v1.11.0](adamchainz/blacken-docs@v1.10.0...v1.11.0)
- [github.com/psf/black: 21.7b0 → 21.9b0](psf/black@21.7b0...21.9b0)

.pre-commit-config.yaml

@@ -21,20 +21,20 @@ repos:
         args: [--autofix, --no-sort-keys]
     -   id: trailing-whitespace
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v2.23.3
+    rev: v2.26.0
     hooks:
     -   id: pyupgrade
         args: [
           --py36-plus
         ]
 -   repo: https://github.com/asottile/blacken-docs
-    rev: v1.10.0
+    rev: v1.11.0
     hooks:
     -   id: blacken-docs
         additional_dependencies: [black==19.3b0]
         files: '(\.md|\.rst)$'
 -   repo: https://github.com/psf/black
-    rev: 21.7b0
+    rev: 21.9b0
     hooks:
     -   id: black
         files: '(\.pyi?|wscript)$'