Change object property access to array access for blog data in add-on template.
The config('app.blogs') returns arrays not objects, causing "Attempt to read
property 'slug' on array" error on /temp-gmail route.
Fixes $blog->slug, $blog->post_image, and $blog->post to use array syntax
in resources/views/livewire/add-on.blade.php:607,614,616