[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/adamchainz/django-upgrade: 1.6.1 → 1.7.0](adamchainz/django-upgrade@1.6.1...1.7.0)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -20,7 +20,7 @@ repos:
     -   id: pyupgrade
         args: [--py37-plus]
 -   repo: https://github.com/adamchainz/django-upgrade
-    rev: 1.6.1
+    rev: 1.7.0
     hooks:
     -   id: django-upgrade
         args: [--target-version, "3.2"]