docs(api): fix API docs rendering

- Use a resolution override for `marked` to be compatible with latest dgeni-packages
- before: found 64 vulnerabilities (1 low, 43 moderate, 17 high, 3 critical)
- after: found 51 vulnerabilities (1 low, 30 moderate, 17 high, 3 critical)
- fix some npm audit issues

Relates to angular/angular.js#17163. Relates to angular#11881. Relates to angular#12111.

Author: Splaktar