Lots of links broken in API live doc

[zxkane]

For example, the doc of GithubWorkflow.on(events), see markdown source code not hyperlink like below,

events ([github.workflows.Triggers](#projen-github-workflows-triggers)) The event(s) to trigger the workflow.
branchProtectionRule ([github.workflows.BranchProtectionRuleOptions](#projen-github-workflows-branchprotectionruleoptions)) Runs your workflow anytime the branch_protection_rule event occurs. Optional
checkRun ([github.workflows.CheckRunOptions](#projen-github-workflows-checkrunoptions)) Runs your workflow anytime the check_run event occurs. Optional
checkSuite ([github.workflows.CheckSuiteOptions](#projen-github-workflows-checksuiteoptions)) Runs your workflow anytime the check_suite event occurs. Optional
create ([github.workflows.CreateOptions](#projen-github-workflows-createoptions)) Runs your workflow anytime someone creates a branch or tag, which triggers the create event. Optional

[Chriscbr]

Thanks for calling this out!

This is a bug with the old version of jsii-docgen we are using, though I'm sort of putting off upgrading it because the newer versions produce docs that are (a) much larger, and (b) do not provide a table of contents at the beginning.

(a) might be OK for now, not sure -- if not, it needs to be split into multiple pages somehow. (b) seems like a downgrade in experience, so I created a tracking issue in jsii-docgen about it (cdklabs/jsii-docgen#584)