added yfdyh000 as contributor

README.MD

@@ -54,6 +54,7 @@ Please follow these steps if you find an unknown issue:
 - Please report the issue with a short description describing how to reproduce the issue, Browser version, OS name and version here: https://github.com/gildas-lormeau/SingleFile/issues.
 
 ## Contributors
+- Chinese translation done by yfdyh000 (https://github.com/yfdyh000)
 - Japanese translation done by Shitennouji（四天王寺) (https://github.com/Shitennouji)
 - Polish translation done by xesarni (https://github.com/xesarni)
 - Russian translation done by rstp14 (https://github.com/rstp14)

extension/ui/pages/help.html

@@ -462,6 +462,7 @@
 			<li>
 				<a id="contributors">Contributors</a>
 				<ul>
+					<li>Chinese translation done by yfdyh000 (<a href="https://github.com/yfdyh000">GitHub profile</a>)</li>
 					<li>Japanese translation, done by Shitennouji （四天王寺) (<a href="https://github.com/Shitennouji">GitHub profile</a>)</li>
 					<li>Polish translation done by xesarni (<a href="https://github.com/xesarni">GitHub profile</a>)</li>
 					<li>Russian translation done by rstp14 (<a href="https://github.com/rstp14">GitHub profile</a>)</li>