[pre-commit.ci] pre-commit autoupdate (#61)

updates:
- [github.com/adamchainz/django-upgrade: 1.4.0 → 1.7.0](adamchainz/django-upgrade@1.4.0...1.7.0)

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

.pre-commit-config.yaml

@@ -6,7 +6,7 @@ repos:
         args: ["--py38-plus"]
 
   - repo: https://github.com/adamchainz/django-upgrade
-    rev: '1.4.0'
+    rev: '1.7.0'
     hooks:
       - id: django-upgrade
         args: [--target-version, "3.2"]