About page: alphabetize problem writers, fix testsolving title, add Partnerships Lead

[devin-ai-integration]

Summary

Three content updates to the about page (content/about.md):

1. Alphabetize Problem Writers: Moved "Ittai Nelken-Regev" from the end of the list to its correct alphabetical position (between "Isaac Li" and "Jason Guo"). Also reformatted line lengths for consistency.
2. Rename "Test-solving" → "Testsolving": Changed "Head of Test-solving" to "Head of Testsolving" (single unhyphenated word, per user request).
3. Add Partnerships Lead: Added { title = "Partnerships Lead", members = ["Golden Peng"] } to the logistics column, placed between Finance Lead and Satellites Lead.

Updates since last revision

• Changed "Head of Test Solving" → "Head of Testsolving" per user feedback (single word, no space or hyphen).

Review & Testing Checklist for Human

• Spot-check that no problem writers were dropped during the reorder (count: 44 names before and after).
• Verify placement of Partnerships Lead in the logistics column is in the desired order relative to other lead roles.

Notes

• The Problem Writers list was also reflowed to ~5 names per line for readability; no names were added or removed, only "Ittai Nelken-Regev" was repositioned.

Link to Devin session: https://app.devin.ai/sessions/449035e8c08a42b586d7dc365be88c49

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