docs: fix incorrect data sources panel reference in SQL tutorial

[icholy]

📝 Summary

Fix incorrect "Data sources panel" tip in the SQL tutorial to reference the variables panel instead.

🔍 Description of Changes

#7459 combined the "Variables" and "Data Sources" panels into a single "Variables & Data Sources" panel, but the SQL tutorial was not updated to reflect this change.

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• Tests have been added for the changes made.
• Documentation has been updated where applicable, including docstrings for API changes.
• Pull request title is a good summary of the changes - it will be used in the release notes.

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	Feb 22, 2026 7:52pm

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[icholy]

I have read the CLA Document and I hereby sign the CLA

[akshayka]

Thank you!

[akshayka]

@icholy any chance you can run the snapshot test locally and push up to appease CI?

[icholy]

@akshayka my bad, I didn't think this change would impact the tests. Updated.

[akshayka]

@akshayka my bad, I didn't think this change would impact the tests. Updated.

All good, thank you!