Bump django-anymail[mailgun] from 10.0 to 10.1 (#294)

Bumps [django-anymail[mailgun]](https://github.com/anymail/django-anymail) from 10.0 to 10.1.
- [Release notes](https://github.com/anymail/django-anymail/releases)
- [Changelog](https://github.com/anymail/django-anymail/blob/main/CHANGELOG.rst)
- [Commits](anymail/django-anymail@v10.0...v10.1)

---
updated-dependencies:
- dependency-name: django-anymail[mailgun]
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/production.txt

@@ -9,4 +9,4 @@ sentry-sdk==1.30.0  # https://github.com/getsentry/sentry-python
 
 # Django
 # ------------------------------------------------------------------------------
-django-anymail[mailgun]==10.0  # https://github.com/anymail/django-anymail
+django-anymail[mailgun]==10.1  # https://github.com/anymail/django-anymail