Update django-rest-passwordreset requirement

Updates the requirements on [django-rest-passwordreset](https://github.com/anexia-it/django-rest-passwordreset) to permit the latest version.
- [Release notes](https://github.com/anexia-it/django-rest-passwordreset/releases)
- [Changelog](https://github.com/anexia-it/django-rest-passwordreset/blob/master/CHANGELOG.md)
- [Commits](anexia-it/django-rest-passwordreset@1.1.0...1.5.0)

---
updated-dependencies:
- dependency-name: django-rest-passwordreset
  dependency-type: direct:production
...

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

requirements/base.txt

@@ -6,7 +6,7 @@ django-cors-headers>=4.0,<4.7
 django-userforeignkey>=0.3,<0.6
 drf-multitokenauth>=2.0.0,<2.1.0
 django-rest-registration>=0.8.3,<0.10
-django-rest-passwordreset>=1.1,<1.5
+django-rest-passwordreset>=1.1,<1.6
 drf-spectacular[sidecar]>=0.26.2,<0.28
 django-environ>=0.10.0,<0.12
 django-gravatar2>=1.4.4,<1.5