Update GenerateAppImage.java

Author: fvarrui

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

@@ -73,6 +73,7 @@ protected File doApply(LinuxPackager packager) throws Exception {
 		Logger.info("Running appimagetool on " + appFolder);
 		CommandUtils.execute(
 				appImageTool,
+				"--appimage-extract-and-run",
 				appDir,
 				appImage
 			);