fix: Fix trunk.yaml lint error

[martimlobao]

• this file is causing my CI checks to fail because it fails yamllint

[martimlobao]

For context, here's an example: https://github.com/martimlobao/regybox/runs/33149046796

I only enabled the PR check from the Trunk app, the repo where the error is happening hasn't changed, and the file Trunk complains about is being downloaded from here.

[martimlobao]

A more robust solution would be to have the linters not lint the contents of the .trunk directory itself, but I'm not sure how to do that and this works as an easy fix for now.