fix appimage

plugins/updater/tests/app-updater/src/main.rs

@@ -48,7 +48,7 @@ fn main() {
                     }
                     Err(e) => {
                         eprintln!("{e}");
-                        std::process::exit(1);
+                        std::process::exit(3);
                     }
                 }
             });

plugins/updater/tests/app-updater/tests/update.rs

@@ -146,7 +146,7 @@ fn test_update(app: &Path, update_bundle: PathBuf, signature: PathBuf, target: &
     // run app
     let mut app_cmd = Command::new(app);
     #[cfg(target_os = "linux")]
-    let mut app_cmd = if std::env::var("CI").map(|v| v == "true").unwrap_or_default() {
+    if std::env::var("CI").map(|v| v == "true").unwrap_or_default() {
         app_cmd = Command::new("xvfb-run");
         app_cmd.arg("--auto-servernum").arg(app);
     };