[pre-commit.ci] pre-commit autoupdate (#590)

updates:
- [github.com/adamchainz/django-upgrade: 1.18.0 → 1.19.0](adamchainz/django-upgrade@1.18.0...1.19.0)
- [github.com/adamchainz/blacken-docs: 1.16.0 → 1.18.0](adamchainz/blacken-docs@1.16.0...1.18.0)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.pre-commit-config.yaml

@@ -38,7 +38,7 @@ repos:
   - id: pyupgrade
     args: [--py38-plus]
 - repo: https://github.com/adamchainz/django-upgrade
-  rev: 1.18.0
+  rev: 1.19.0
   hooks:
   - id: django-upgrade
     args: [--target-version, '3.2']
@@ -47,7 +47,7 @@ repos:
   hooks:
   - id: black
 - repo: https://github.com/adamchainz/blacken-docs
-  rev: 1.16.0
+  rev: 1.18.0
   hooks:
   - id: blacken-docs
     additional_dependencies: