Bump django-bootstrap3 from 21.1 to 21.2

Bumps [django-bootstrap3](https://github.com/zostera/django-bootstrap3) from 21.1 to 21.2.
- [Release notes](https://github.com/zostera/django-bootstrap3/releases)
- [Changelog](https://github.com/zostera/django-bootstrap3/blob/main/CHANGELOG.md)
- [Commits](https://github.com/zostera/django-bootstrap3/commits/v21.2)

---
updated-dependencies:
- dependency-name: django-bootstrap3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements/base.txt

@@ -1,5 +1,5 @@
 Django==3.2.10
-django-bootstrap3==21.1
+django-bootstrap3==21.2
 dj-database-url==0.5.0
 dj-static==0.0.6
 django-csp==3.7