Rename example

examples/offscreen-canvas.html

@@ -0,0 +1,10 @@
+---
+layout: example.html
+title: Vector tiles rendered in an offscreen canvas
+shortdesc: Example of a map that delegates rendering to a worker.
+docs: >
+  The map in this example is rendered in a web worker, using `OffscreenCanvas`. **Note:** This is currently only supported in Chrome and Edge.
+tags: "worker, offscreencanvas, vector-tiles"
+experimental: true
+---
+<div id="map" class="map"></div>