Update toc active item selectors (#152)

869854 changes these selectors to use the `toc-` prefix so updating here as
well.

src/engine-scripts/puppet/onReady.js

@@ -50,16 +50,17 @@ module.exports = async ( page, scenario ) => {
 	await fastForwardAnimations( page );
 
 	/**
-	 * Remove the .sidebar-toc-list-item-active class from the item in the toc
-	 * What is focused is variable, so can lead to false positives in pixel.
-	 * Knowing it exists is enough to know it is working.
+	 * Remove the .sidebar-toc-list-item-active, .vector-toc-list-item-active
+	 * class from the item in the toc What is focused is variable, so can lead to
+	 * false positives in pixel.  Knowing it exists is enough to know it is
+	 * working.
 	 */
 	await page.evaluate( () => {
 		document.querySelectorAll(
-			'.sidebar-toc-list-item-active'
+			'.sidebar-toc-list-item-active, .vector-toc-list-item-active'
 		).forEach( ( node ) => {
 			node.classList.remove(
-				'sidebar-toc-list-item-active', 'sidebar-toc-level-1-active'
+				'sidebar-toc-list-item-active', 'vector-toc-list-item-active'
 			);
 		} );
 		return true;