Show Dep Code in ToC

[avivkeller]

The table of contents for deprecations doesn't include the deprecation ID, making it harder to locate the appropriate detail section on https://nodejs-api-docs-tooling.vercel.app/deprecations.html

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Compare to https://nodejs.org/api/deprecations.html

Originally posted by @MikeMcC399 in nodejs/node#62045 (comment)