minor style fix

pages/structures/index.vue

@@ -304,7 +304,7 @@
         v-if="!parentIsCmf"
         :href="cmfStructuresPageUrl"
         target="_blank"
-        class="my-auto mx-4"
+        class="my-auto ma-4"
       >
         <font-awesome-icon :icon="['fas', 'external-link-alt']" class="mr-2" />
         {{ $t('see_national_network') }}