message: docs(bazel): Mention Architect prototype and Slack Channel
  This commit adds a link to the Bazel prototype for orchestrating
  multiple CLI architects and also adds a link to the #angular channel in
  the Bazel Slack workspace.
  PR Close
diff: @@ -15,6 +15,8 @@ In the beginning of this project, we thought it would make Bazel easier for
  users to adopt if we abstracted the BUILD files management and tooling
  orchestration within Angular CLI. However, we have come to realize that such
  abstraction does not encourage users to use Bazel to its full potential.
  +There is currently a [prototype](https://github.com/bazelbuild/rules_nodejs/tree/master/examples/angular_bazel_architect)
  +that showcases how multiple architects within CLI could be orchestrated by Bazel.
  There are a few other reasons for this deprecation:
  @@ -43,6 +45,8 @@ This new rule leverages ngtsc plugin supported by `ts_library`, and it is much f
  For the latest recommendations, please refer to the canonical Angular Bazel [repo](https://github.com/bazelbuild/rules_nodejs/tree/master/examples/angular).
  +For questions, please ask in the `#angular` channel in http://slack.bazel.build/.
  +
  ## Angular CLI
  If you'd like to revert to the default Angular CLI builder, you could restore
  