Update pay btn classes

apps/school/templates/blocks/day_pay_btn.html

@@ -2,5 +2,6 @@
   {% if not user.is_authenticated %}
   data-popup=".js-popup-auth"
   {% endif %}
+  class="timing__btn btn"
   href="{% url 'school-checkout' %}?weekdays={{ school_schedule.weekday }}&add_days=true"
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apps/school/templates/blocks/pay_btn.html

@@ -4,9 +4,9 @@
   {% else %}
   data-popup=".js-popup-buy"
   {% endif %}
-  class="timing__btn btn"
   {% if school_schedule %}
   data-day="{{ school_schedule.weekday }}"
   {% endif %}
+  class="timing__btn btn"
   href="#"
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