Update django-anymail from 11.0.1 to 11.1

{{cookiecutter.project_slug}}/requirements/production.txt

@@ -40,5 +40,5 @@ django-anymail[brevo]==11.1  # https://github.com/anymail/django-anymail
 {%- elif cookiecutter.mail_service == 'SparkPost' %}
 django-anymail[sparkpost]==11.1  # https://github.com/anymail/django-anymail
 {%- elif cookiecutter.mail_service == 'Other SMTP' %}
-django-anymail==11.0.1  # https://github.com/anymail/django-anymail
+django-anymail==11.1  # https://github.com/anymail/django-anymail
 {%- endif %}