Update Packager.java

Author: fvarrui

src/main/java/io/github/fvarrui/javapackager/packagers/Packager.java

@@ -143,7 +143,7 @@ public void resolveResources() throws Exception {
 		licenseFile = resolveLicense(licenseFile);
 
 		// locates icon file
-		iconFile = resolveIcon(iconFile, name, assetsDir);
+		iconFile = resolveIcon(iconFile, name, assetsFolder);
 
 		// adds to additional resources
 		if (additionalResources != null) {