Toolbar - add examples showing new gap props

[thatblindgeye]

Describe the enhancement or change
Follow up to #10418 .We'll also need to update the "Toolbar with spacers" example.

Is this request originating from a Red Hat product team? If so, which ones and is there any sort of deadline for this enhancement?

Any other information?

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.