chore(core_team_docs): Update core team docs
chore(core_team_docs): Update core team docs

* we should run gulp-styleguide-build after adding a new major version
link
* we should not remove our old assets when removing nested old styleguides

[#115740685]

sjolicoeur/pivotal-ui,pivotal-cf/pivotal-ui,sjolicoeur/pivotal-ui,pivotal-cf/pivotal-ui,pivotal-cf/pivotal-ui,sjolicoeur/pivotal-ui,sjolicoeur/pivotal-ui