chore(deps): update pre-commit hook adamchainz/django-upgrade to v1.19.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
adamchainz/django-upgrade	repository	minor	1.18.0 -> 1.19.0

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Release Notes

adamchainz/django-upgrade (adamchainz/django-upgrade)

### [`v1.19.0`](https://togithub.com/adamchainz/django-upgrade/blob/HEAD/CHANGELOG.rst#1190-2024-06-27) [Compare Source](https://togithub.com/adamchainz/django-upgrade/compare/1.18.0...1.19.0) - Add Django 4.2+ fixer to rewrite `index_together` declarations into `indexes` declarations in model `Meta` classes. This fixer can make changes that require migrations. Add a `test for pending migrations `\__ to ensure that you do not miss these. `PR #​464 `\__. - Fix tracking of AST node parents. This may have fixed some subtle bugs in these fixers: - `admin_register` - `assert_form_error` - `default_app_config` - `management_commands` - `request_headers` - `settings_database_postgresql` - `settings_storages` - `testcase_databases` - `use_l10n` - `utils_timezone` If you see any new changes, or had them previously disabled, please report an issue so we can extra tests to the test suite. `PR #​465 `\__.

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