fix: fix svelte dev warning about pinIndex (#1729)

src/routes/_components/community/PageListItem.html

@@ -123,7 +123,8 @@
   export default {
     store: () => store,
     data: () => ({
-      pinnable: false
+      pinnable: false,
+      pinIndex: undefined
     }),
     computed: {
       ariaLabel: ({ label, pinnable, $pinnedPage, href }) => {