Add link to Chinese version of overview (KhronosGroup#2451)

* Add link to Chinese version of overview

* Link to releases and PDF for overview translations

Author: javagl

README.md

@@ -35,7 +35,12 @@ Please provide spec feedback by submitting [issues](https://github.com/KhronosGr
     <a href="https://www.khronos.org/developers/reference-cards/">Khronos reference cards</a>
   </sup><br>
   <sup>
-    <a href=https://github.com/randall2835/gltfOverviewJapanese/releases/download/v0.1/gltfOverview2.0-Japanese.png>Japanese translation</a> by <a href=https://github.com/randall2835/gltfOverviewJapanese>Takuto Takahashi</a>
+    <a href=https://github.com/randall2835/gltfOverviewJapanese/releases/tag/v0.1>Japanese translation</a> |
+    <a href=https://github.com/randall2835/gltfOverviewJapanese/releases/download/v0.1/gltfOverview2.0-Japanese.pdf>PDF</a> |
+    by <a href=https://github.com/randall2835/gltfOverviewJapanese>Takuto Takahashi</a><br>
+    <a href=https://github.com/leeyeel/gltfOverview-Chinese/releases/tag/v2.0.0d>Chinese translation</a> |
+    <a href=https://github.com/leeyeel/gltfOverview-Chinese/releases/download/v2.0.0d/gltfOverview2.0-cn.pdf>PDF</a> |
+    by <a href=https://github.com/leeyeel/gltfOverview-Chinese>@leeyeel</a><br>
   </sup>
 </p>