Update builtins.md

[loganstartoni]

What are you changing in this pull request and why?

When running this macro as it was it never gets to the finally part because it always returns when building the rel variable.

I was not able to use the code as is when trying to override the function because I was trying to edit the relation to not include the db or schema, but the code to override the relation was never ran because of the early returns.

Checklist

• Review the Content style guide so my content adheres to these guidelines.
• For docs versioning, review how to version a whole page and version a block of content.
• Add a checklist item for anything that needs to happen before this PR is merged, such as "needs technical review" or "change base branch."

Adding or removing pages (delete if not applicable):

• Add/remove page in website/sidebars.js
• Provide a unique filename for new pages
• Add an entry for deleted pages in website/static/_redirects
• Run link testing locally with npm run build to update the links that point to deleted pages

[welcome]

Hello!👋 Thanks for contributing to the dbt product documentation and opening this pull request! ✨
We use Markdown and some HTML to write the dbt product documentation. When writing content, you can use our style guide and content types to understand our writing standards and how we organize information in the dbt product docs.
We'll review your contribution and respond as soon as we can. 😄

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Name	Status	Preview	Comments	Updated (UTC)
docs-getdbt-com	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 12, 2024 1:39pm

[mirnawong1]

testing this today

[mirnawong1]

tested and return may be removed as it's not mandatory. cc @dbeatty10

thank you for opening this @loganstartoni ! i appreciate you clarifying the docs and I'll get this merged for you. looking forward to future contributions! ✨