fix wporg readme typo

readme.txt

@@ -111,7 +111,7 @@ _Here's what changed in the past 3 releases. To access the complete changelog hi
 
 - New shortcode attribute `layout` to specify a custom layout for the `[ptc_asana_project]` shortcode. Note this is only useful for extenders and third-party customizations. Completionist always displays projects in `list` layout by default.
 - New shortcode attribute `sort_tasks_by` to sort tasks by the specified field. Common values are `due_on`, `assignee`, `completed_at`, and `name`. Unlike Asana, subtasks are also sorted.
-- `.pdf` video attachments on tasks are now supported.
+- `.pdf` attachments on tasks are now supported.
 - External attachments (eg. Vimeo and YouTube embeds) are now displayed as their oEmbed HTML representations when available.
 
 #### Changed