Update logo image

Author: jeromewu

README.md

@@ -3,7 +3,7 @@
 
 <p align="center">
   <a href="#">
-    <img alt="ffmpeg.wasm" width="128px" height="128px" src="https://github.com/ffmpegwasm/ffmpeg.wasm/raw/master/docs/images/ffmpegjs-icon.png">
+    <img alt="ffmpeg.wasm" width="128px" height="128px" src="https://github.com/ffmpegwasm/ffmpeg.wasm/raw/master/docs/images/ffmpegwasm-icon.png">
   </a>
 </p>