Bump @angular-devkit/build-angular in /samples/lib/spa-angular-client

Bumps [@angular-devkit/build-angular](https://github.com/angular/angular-cli) from 0.901.6 to 0.901.7.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Commits](https://github.com/angular/angular-cli/commits)

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

Author: dependabot-preview[bot]