fix: display link as inline block

This stops the SVG from dropping outside the box when a localised string
is longer than the box can hold.

src/snapshots/templates/article.css.j2

@@ -143,7 +143,7 @@ figcaption {
 .snap-footer-link {
   box-sizing: border-box;
   color: #333;
-  display: block;
+  display: inline-block;
   max-width: 335px;
   width: 100%;
   border: 1px solid #e0dfdd;