fix: update docs example

[ra0x3]

Thanks for opening a PR with the Fuel Indexer project. Please review the Checklist below and ensure you've completed all of the necessary steps to make this PR review as painless as possible.

Checklist

• Ensure your top-level commit message is in line with our contributor guidelines.
• Please add proper labels.
• If there is an issue associated with this PR, please link the issue (right-hand sidebar)
• If there is not an issue associated with this PR, add this PR to the "Fuel Indexer" project (right-hand sidebar)
• Please allow Codeowners at least 24 hours to do a first-pass review.
• Please add thoroughly detailed testing steps below.
• Please keep your Changelog message short and sweet.

Description

Please include a short description of what this PR does.

Testing steps

Please provide the exact testing steps for the reviewer(s) if this PR requires testing.

Changelog

Please add neat Changelog info here, according to our Contributor's Guide.

[ra0x3]

@deekerno Could you remind me how you viewed the docs portal locally? Wanna see if this fixes things (even though apparently it doesn't show any changes)

[deekerno]

I gotchu.

---

In order to read the documentation in the intended form (as part of the docs hub at docs.fuel.network), run the following steps:

• Clone the docs hub repository -- https://github.com/FuelLabs/docs-hub -- and follow the setup instructions.
• Open .gitmodules and add branch = [insert branch here] to the fuel-indexer section.
• Update the submodule for the indexer repo: git submodule update --remote docs/fuel-indexer.
• Run pnpm dev and navigate to localhost:3000 to read the docs.

[ra0x3]

@deekerno @lostman

• Looks like @sarahschwartz has the fix in fix: indexer code formatting docs-hub#58
• This PR still updates a single example, so still good to have