[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/pre-commit/pre-commit-hooks: v5.0.0 → v6.0.0](pre-commit/pre-commit-hooks@v5.0.0...v6.0.0)
- [github.com/asottile/blacken-docs: 1.19.1 → 1.20.0](adamchainz/blacken-docs@1.19.1...1.20.0)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -18,7 +18,7 @@
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
     - id: trailing-whitespace
       args: [--markdown-linebreak-ext=md]
@@ -108,7 +108,7 @@ repos:
   hooks:
   - id: black
 - repo: https://github.com/asottile/blacken-docs
-  rev: 1.19.1
+  rev: 1.20.0
   hooks:
   - id: blacken-docs
     args: [--line-length=80]