fix: fix css for small columns

[astromechza]

We had a bug where the width of the article was extending beyond the page width on small < 48rem screen sizes. To fix this I've adjusted the blog post content classes:

1. Expand max width size from 48 to 56rem for readability
2. Add w-full to anchor article width to page width. This allows (1) to actually wrap smaller when the page is smaller than 56rem.
3. Removed lg:px-0 toggle since we don't need the width adjustment to toggle and can keep the 5rem margin at all times.

Before

After