add aria-role:none to get rid of warning (sveltejs#522)

* add aria-role:none to get rid of warning

* Apply suggestions from code review

---------

Co-authored-by: Rich Harris <[email protected]>

Author: Snailedlt

content/tutorial/02-advanced-svelte/01-motion/02-springs/app-a/src/lib/App.svelte

@@ -11,6 +11,7 @@
 	}}
 	on:mousedown={() => size.set(30)}
 	on:mouseup={() => size.set(10)}
+	role="presentation"
 >
 	<circle
 		cx={$coords.x}

content/tutorial/02-advanced-svelte/01-motion/02-springs/app-b/src/lib/App.svelte

@@ -15,6 +15,7 @@
 	}}
 	on:mousedown={() => size.set(30)}
 	on:mouseup={() => size.set(10)}
+	role="presentation"
 >
 	<circle
 		cx={$coords.x}