Convert to composition API

apps/showcase/doc/forms/dynamic/DynamicFormSubmit.vue

@@ -2,18 +2,17 @@
     <Button type="submit" :severity :label />
 </template>
 
-<script>
-export default {
-    name: 'DynamicFormSubmit',
-    props: {
-        severity: {
-            type: String,
-            default: 'secondary'
-        },
-        label: {
-            type: String,
-            default: 'Submit'
-        }
+<script setup>
+import Button from 'primevue/button';
+
+const props = defineProps({
+    severity: {
+        type: String,
+        default: 'secondary'
+    },
+    label: {
+        type: String,
+        default: 'Submit'
     }
-};
+});
 </script>