fix: url field design (#832)

Author: lukasvinclav

src/unfold/templates/unfold/widgets/url.html

@@ -1,7 +1,9 @@
-<div class="flex flex-row gap-2 items-center">
-  {% include "django/forms/widgets/input.html" %}
+<div class="flex flex-col gap-2">
+    {% include "django/forms/widgets/input.html" %}
 
-  {% if url_valid %}
-    {{ current_label }} <a href="{{ widget.href }}" class="text-primary-600 dark:text-primary-500">{{ widget.value }}</a>
-  {% endif %}
+    {% if url_valid %}
+        <p class="text-xs">
+            {{ current_label }} <a href="{{ widget.href }}" class="text-primary-600 dark:text-primary-500">{{ widget.value }}</a>
+        </p>
+    {% endif %}
 </div>