Fix typo from #44083 (#44358)

test/e2e/specs/editor/various/writing-flow.spec.js

@@ -700,7 +700,7 @@ test.describe( 'Writing Flow', () => {
 		const x = paragraphRect.x + ( 2 * paragraphRect.width ) / 3;
 		const y = paragraphRect.y + paragraphRect.height + 1;
 
-		// The typing observer requires two mouse moves to dectect and actual
+		// The typing observer requires two mouse moves to detect an actual
 		// move.
 		await page.mouse.move( x - 1, y - 1 );
 		await page.mouse.move( x, y );