Bump django-bootstrap4 in /{{cookiecutter.project_slug}}

Bumps [django-bootstrap4](https://github.com/zostera/django-bootstrap4) from 22.3 to 25.1.
- [Release notes](https://github.com/zostera/django-bootstrap4/releases)
- [Changelog](https://github.com/zostera/django-bootstrap4/blob/main/CHANGELOG.md)
- [Commits](zostera/django-bootstrap4@v22.3...v25.1)

---
updated-dependencies:
- dependency-name: django-bootstrap4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

{{cookiecutter.project_slug}}/Pipfile

@@ -18,7 +18,7 @@ psycopg2 = "<=2.9.9"
 waitress = "~=3.0.2"
 whitenoise = "~=6.9.0"
 djangorestframework = "~=3.15.1"
-django-bootstrap4 = "~=22.1"
+django-bootstrap4 = "~=25.1"
 django-allauth = "~=0.63.6"
 django-extensions = "~=3.2.3"
 packaging = "==24.1"