fixed old Django 2 translation template tags

allianceauth/authentication/templates/registration/registration_form.html

@@ -8,7 +8,7 @@
         {% csrf_token %}
         {{ form|bootstrap }}
         <br/>
-        <button class="btn btn-lg btn-primary btn-block" type="submit">{% trans "Submit" %}</button>
+        <button class="btn btn-lg btn-primary btn-block" type="submit">{% translate "Submit" %}</button>
         <br/>
     </form>
 {% endblock %}