Bump zone.js from 0.8.26 to 0.8.29 in /angular/ng-docker

Bumps [zone.js](https://github.com/angular/angular/tree/HEAD/packages/zone.js) from 0.8.26 to 0.8.29.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/master/packages/zone.js/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/HEAD/packages/zone.js)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]