message: scripts: update package private check to handle undefined
diff: @@ -45,7 +45,7 @@ async function main() {
  p =>
  (p.packageJson.name.startsWith('@backstage/') ||
  p.packageJson.name.startsWith('@techdocs/')) &&
  - p.packageJson.private === false,
  + p.packageJson.private !== true,
  )
  .map(p => {
  return { name: p.packageJson.name, version: p.packageJson.version };
  