improve accessibility

app/javascript/submission_form/number_step.vue

@@ -23,6 +23,7 @@
   />
   <div
     v-if="field.description"
+    :id="field.uuid + '-desc'"
     dir="auto"
     class="mb-3 px-1 field-description-text"
   >
@@ -44,6 +45,7 @@
       :max="field.validation?.max"
       class="base-input !text-2xl w-full"
       :required="field.required"
+      :aria-describedby="field.description ? field.uuid + '-desc' : undefined"
       :placeholder="`${t('type_here_')}${field.required ? '' : ` (${t('optional')})`}`"
       :name="`values[${field.uuid}]`"
       @focus="$emit('focus')"