Fix screenshot link

README.md

@@ -3,5 +3,5 @@
 [projectM](http://projectm.sourceforge.net/) is an awesome music visualizer.<br/>
 DISTRHO ProM makes it work as an audio plugin (LV2 and VST).<br/>
 
-## Screenshot
-![ProM](https://raw.githubusercontent.com/DISTRHO/mini-series/master/plugins/ProM/Screenshot.png "ProM")<br/>
+## Screenshot (in jalv.gtk)
+![ProM](https://raw.githubusercontent.com/DISTRHO/prom/master/plugins/ProM/Screenshot.png "ProM")<br/>