Update django-simple-history requirement from ~=3.7 to ~=3.8

Updates the requirements on [django-simple-history](https://github.com/jazzband/django-simple-history) to permit the latest version.
- [Release notes](https://github.com/jazzband/django-simple-history/releases)
- [Changelog](https://github.com/jazzband/django-simple-history/blob/master/CHANGES.rst)
- [Commits](jazzband/django-simple-history@3.7.0...3.8.0)

---
updated-dependencies:
- dependency-name: django-simple-history
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -16,7 +16,7 @@ django-environ==0.11.2
 django-formtools~=2.5
 django-prometheus==2.3.1
 django-recaptcha~=4.0.0
-django-simple-history~=3.7
+django-simple-history~=3.8
 django-storages~=1.14
 django-compressor~=4.5
 drf-spectacular[sidecar]==0.28.0