Add recommendation to test Universal-3 Pro without a prompt first

[devin-ai-integration]

Add recommendation to test Universal-3 Pro without a prompt first

Summary

Adds a <Note> callout near the top of the Universal-3 Pro docs page (after the Overview section, before "Example prompts and behavior") recommending that customers test the model without a custom prompt first to establish a baseline, and then craft a prompt and compare outputs.

This addresses the concern that customers may be crafting prompts without first testing the model out of the box, potentially resulting in worse accuracy.

Review & Testing Checklist for Human

• Verify the wording accurately conveys the intended recommendation — confirm with @george that the tone and messaging align with what he had in mind
• Check placement: the note appears after the overview paragraph and before "Example prompts and behavior" — confirm this is prominent enough ("near the top")
• Preview the rendered docs page to ensure the <Note> component renders correctly

Notes

• Requested by: @MLawlz
• Link to Devin run

[devin-ai-integration]

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