fix: button component name (#749)

Author: lukasvinclav

src/unfold/templates/unfold/components/button.html

@@ -1,3 +1,3 @@
-<button {% if submit %}type="submit"{% endif%} class="bg-primary-600 border border-transparent font-medium px-3 py-2 rounded-md text-sm text-white">
+<button {% if submit %}type="submit"{% endif%} {% if name %}name="{{ name }}"{% endif %} class="bg-primary-600 border border-transparent font-medium px-3 py-2 rounded-md text-sm text-white">
     {{ children }}
 </button>