Bump prospector from 1.11.0 to 1.12.1 in /requirements

Bumps [prospector](https://github.com/PyCQA/prospector) from 1.11.0 to 1.12.1.
- [Release notes](https://github.com/PyCQA/prospector/releases)
- [Changelog](https://github.com/prospector-dev/prospector/blob/master/CHANGELOG.rst)
- [Commits](prospector-dev/prospector@v1.11.0...v1.12.1)

---
updated-dependencies:
- dependency-name: prospector
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

requirements/dev.txt

@@ -1,7 +1,7 @@
 -r base.txt
 
 pytest-django==4.9.0
-prospector==1.11.0
+prospector==1.12.1
 factory_boy==3.3.1
 Faker==30.3.0
 django-debug-toolbar==4.4.6