add comment for linux version

lib/main-app.js

@@ -128,6 +128,7 @@ const updater = new GhReleases(ghReleasesOpts)
 // Check for updates
 // `status` returns true if there is a new update available
 function checkUpdate () {
+  // Disable check update(Linux only)
   return true
   updater.check((err, status) => {
     if (err) {
@@ -276,6 +277,7 @@ app.on('ready', function () {
     mainWindow.hide()
   })
 
+  // Disable Finder(Linux only)
   // if (finderProcess == null && process.platform === 'darwin') {
   //   spawnFinder()
   // } else {