Add missing table of contents for dev guides
What does this MR do and why?
Fixes missing TOC for some development pages
Screenshots, screen recordings, or links to review app
| enum | emails | abstractions |
|---|---|---|
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How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
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Configure a local GitLab Docs environment: https://gitlab.com/gitlab-org/gitlab-docs/-/blob/main/doc/setup.md.
Merge request acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this merge request.
Edited by Doug Stull