Upgrade Scorewarrior sponsor tier to Corporate Diamond

Author: halx99

README.md

@@ -168,7 +168,7 @@ If you find **Axmol Engine** helpful, please consider donating in [https://axmol
 
 ## Sponsors
 
-#### Platinum Sponsors
+#### Corporate Diamond
 
 <p align="left">
   <a href="https://scorewarrior.com/?ad=axmol" target=_blank><img

README_CN.md

@@ -168,7 +168,7 @@ Axmol 引擎在 Cocos2d-x v4.0 的基础上进行迭代和改进。现在速度
 
 ## Sponsors
 
-#### Platinum Sponsors
+#### Corporate Diamond
 <p align="left">
   <a href="https://scorewarrior.com/?ad=axmol" target=_blank><img
     src="https://cdn.prod.website-files.com/633da33305ac754156026dd8/63566f1edf5f0712f94f7f1b_sw-triangle-821890.svg" height="120"