Update index.md

Author: oxygen-dioxide

topics/openutau/index.md

@@ -3,7 +3,7 @@ created_by: stakira
 display_name: OpenUtau
 short_description: OpenUtau is an open source singing synthesis platform.
 topic: openutau
-logo: openutau.svg
+logo: openutau.png
 url: http://www.openutau.com/
 ---
 OpenUtau is an open source singing synthesis platform with modern user experience and native support for multiple voicebank ecosystems and various spoken languages.