Update GenerateAppImage.java

Author: fvarrui

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

@@ -71,7 +71,7 @@ protected File doApply(LinuxPackager packager) throws Exception {
 
 		// runs appimagetool on appFolder
 		Logger.info("Running appimagetool on " + appFolder);
-		CommandUtils.executeOnDirectory(
+		CommandUtils.execute(
 				appImageTool,
 				"--appimage-extract-and-run",
 				appDir,