fixed the outputCollectionPath

Author: thooore

SpleeterGui/Form1.cs

@@ -1316,6 +1316,7 @@ private void run_StemSyncer()
                         createNewCollection = " -create";
                     }
                     collectionPath = (char)34 + collectionPath + (char)34;
+                    outputCollectionPath = (char)34 + outputCollectionPath + (char)34;
 
                     textBox1.AppendText("\r\n" +
                         "Running StemSyncer!");