build(deps): Update django-anymail requirement (#1532)

Updates the requirements on [django-anymail](https://github.com/anymail/django-anymail) to permit the latest version.
- [Release notes](https://github.com/anymail/django-anymail/releases)
- [Changelog](https://github.com/anymail/django-anymail/blob/main/CHANGELOG.rst)
- [Commits](anymail/django-anymail@v13.0...v14.0)

---
updated-dependencies:
- dependency-name: django-anymail
  dependency-version: '14.0'
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -22,7 +22,7 @@ dependencies = [
     "django-loginas>=0.3.11,<0.4.0",
 
     # Email & Communications
-    "django-anymail>=13.0,<14.0",
+    "django-anymail>=13.0,<15.0",
 
     # UI & Templates
     "django-bootstrap3>=25.1,<26.0",