Fixed unpkg link for threejs (#2070)

spine-ts/README.md

@@ -56,8 +56,8 @@ You can include a module in your project via a `<script>` tag from the [unpkg](h
 <script src="https://unpkg.com/@esotericsoftware/[email protected].*/dist/iife/spine-player.js">
 <link rel="stylesheet" href="https://unpkg.com/@esotericsoftware/[email protected].*/dist/spine-player.css">
 
-// spine-ts WebGL
-<script src="https://unpkg.com/@esotericsoftware/[email protected].*/dist/iife/spine-webgl.js">
+// spine-ts ThreeJS
+<script src="https://unpkg.com/@esotericsoftware/[email protected].*/dist/iife/spine-threejs.js">
 ```
 
 We also provide `js.map` source maps. They will be automatically fetched from unpkg when debugging code of a spine-module in Chrome, Firefox, or Safari, mapping the JavaScript code back to its original TypeScript sources.
@@ -113,4 +113,4 @@ The final command `npm run dev` will start a local web server at http://127.0.0.
 
 You can then open Visual Studio Code to inspect, edit, and debug the source code. We also supply launch configurations to start examples and demos in debug mode, so you can debug them right inside Visual Studio code.
 
-To build the artifacts as they are published to NPM, run `npm run build`.
+To build the artifacts as they are published to NPM, run `npm run build`.