message: fix(gui): Fix "about" menu entry
  This fixes the capitalization of the "About Etcher" entry in the application menu
  Change-Type: patch
diff: @@ -107,7 +107,8 @@ const buildWindowMenu = (window) => {
  menuTemplate.unshift({
  label: packageJson.displayName,
  submenu: [ {
  - role: 'about'
  + role: 'about',
  + label: 'About Etcher'
  }, {
  type: 'separator'
  }, {
  