web: Resolve a TypeDoc warning in the comment for Setup

ruffle/web $ npm run docs
> [warning] Failed to resolve link to "PlayerElement" in comment for Setup

web/packages/core/src/public/setup/index.ts

@@ -1,6 +1,6 @@
 /**
  * The Setup module contains the interfaces and methods needed to install Ruffle onto a page,
- * and create a {@link PlayerElement} with the latest version of Ruffle available.
+ * and create a {@link Player.PlayerElement} with the latest version of Ruffle available.
  *
  * This is primarily relevant to users of `ruffle-core` as a npm module, as the "selfhosted" version of Ruffle preinstalls itself,
  * and without type checking the interfaces here are of limited use.
@@ -10,7 +10,7 @@
  *
  * Multiple sources of Ruffle may exist - for example, the Ruffle browser extension also installs itself on page load.
  * For this reason, you are required to call `window.RufflePlayer.newest()` (for example) to grab the latest {@link SourceAPI},
- * from which you can create a {@link PlayerElement} via {@link SourceAPI.createPlayer}.
+ * from which you can create a {@link Player.PlayerElement} via {@link SourceAPI.createPlayer}.
  *
  * @module
  */