fix: Correct the URL scheme for one path

Author: Sqyphen

components/o-topper/demos/src/package.mustache

@@ -14,7 +14,7 @@
 	<figure class="o-topper__visual">
 		<picture class="o-topper__picture">
 			<source media="(max-width: 1440px)" srcset="https://images.ft.com/v3/image/raw/http://prod-upp-image-read.ft.com/87c44eba-a823-11e7-ab55-27219df83c97?source=origami&amp;fit=scale-down&amp;quality=highest&amp;width=720 720w">
-			<source media="(min-width: 1440px)" srcset="https://www.ft.com/__origami/service/image/v2/images/raw/http://prod-upp-image-read.ft.com/8c35d22a-a823-11e7-ab55-27219df83c97?source=origami&amp;fit=scale-down&amp;quality=highest&amp;width=800">
+			<source media="(min-width: 1440px)" srcset="https://www.ft.com/__origami/service/image/v2/images/raw/https://prod-upp-image-read.ft.com/8c35d22a-a823-11e7-ab55-27219df83c97?source=origami&amp;fit=scale-down&amp;quality=highest&amp;width=800">
 			<img alt="" class="o-topper__image" src="https://www.ft.com/__origami/service/image/v2/images/raw/http://prod-upp-image-read.ft.com/aed45398-a99e-11e7-93c5-648314d2c72c?source=origami&amp;fit=scale-down&amp;quality=highest&amp;width=800">
 		</picture>
 	</figure>