Updates "Saving to a Database" example to distinguish content changes (#4497)
Updates "Saving to a Database" example to distinguish content changes (#4497)

* Updates "Saving to a Database" example to distinguish actual content changes.

* Update docs/walkthroughs/06-saving-to-a-database.md

* Update docs/walkthroughs/06-saving-to-a-database.md

* Update docs/walkthroughs/06-saving-to-a-database.md

* Runs prettier

Co-authored-by: Dylan Schiemann <dd378c4ca75f71f527acddef5b43fc35b68d5b7a@dojotoolkit.org>
ianstormtaylor/slate,ianstormtaylor/slate