fix: disable mask close on at import second step

Signed-off-by: mertmit <mertmit99@gmail.com>

packages/nc-gui/components/dlg/AirtableImport.vue

@@ -309,6 +309,7 @@ onMounted(async () => {
   <a-modal
     v-model:visible="dialogShow"
     :class="{ active: dialogShow }"
+    :mask-closable="step !== 2"
     width="max(30vw, 600px)"
     class="p-2"
     wrap-class-name="nc-modal-airtable-import"