Add snippet explaining lazy-loading inside an MDX file. (#22186)
Add snippet explaining lazy-loading inside an MDX file. (#22186)

* Add blurb

* Rephrase / fix

* Show consumption example

* Implement feedback

* Rename file title

Co-authored-by: gatsbybot <313a651c59fdaade90d152972001707d94b0975c@gmail.com>
gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby