message: tests: prefix Cypress JUnit files with `junit-`
  This matches the filename pattern expected by CI.
diff: {
  "reporterEnabled": "spec, mocha-junit-reporter",
  "mochaJunitReporterReporterOptions": {
  - "mochaFile": "../../gui_test_screenshots/cypress-output-[hash].xml",
  + "mochaFile": "../../gui_test_screenshots/junit-cypress-[hash].xml",
  "toConsole": false
  }
  }
  