Fix link

Author: vmpstr

css-shared-element-transitions-1/Overview.bs

@@ -68,7 +68,7 @@ with a single call to the JavaScript API.
 
 The user-agent provides additional JavaScript functionality and promises to
 control and observe the state of the animations. These are described in detail
-in the [=DOMTransition=] section.
+in the {{DOMTransition}} section.
 
 After the callback has finished running, the user-agent creates a structure of
 pseudo-elements that represent both the "before" and "after" states of the