Update pankow to v4 to fix TableView bug

dashboard/src/components/SystemBackupList.vue

@@ -272,7 +272,7 @@ defineExpose({ refresh });
     </template>
 
     <TableView :columns="columns" :model="backups" :busy="busy" :placeholder="$t('backups.listing.noBackups')">
-      <template #creationTime="backup">
+      <template #creationTime="{ item:backup }">
         <div>
           <span>{{ prettyLongDate(backup.creationTime) }}</span>
           <span v-if="backup.label">&nbsp;<b>{{ backup.label }}</b></span>
@@ -280,18 +280,18 @@ defineExpose({ refresh });
         </div>
       </template>
 
-      <template #content="backup">
+      <template #content="{ item:backup }">
         <span v-if="backup.appCount">{{ $t('backups.listing.appCount', { appCount: backup.appCount }) }}</span>
         <span v-else>{{ $t('backups.listing.noApps') }}</span>
       </template>
 
-      <template #size="backup">
+      <template #size="{ item:backup }">
         <span v-if="backup.stats?.aggregatedUpload">{{ prettyFileSize(backup.stats.aggregatedUpload.size) }} | {{ backup.stats.aggregatedUpload.fileCount }} file(s)</span>
       </template>
 
-      <template #site="backup">{{ backup.site.name }}</template>
+      <template #site="{ item:backup }">{{ backup.site.name }}</template>
 
-      <template #actions="backup">
+      <template #actions="{ item:backup }">
         <ActionBar :actions="createActionMenu(backup)"/>
       </template>
     </TableView>