Replace the withdrawn Pesenti–Vladu 3.7 bound on C₁₀c with 4.1

[Chessing234]

Summary

• arXiv:2211.05509 v2 comments record an erratum: Theorem 4.5 is corrected from 3.7 to 4.1.
• Keep the old $3\sqrt{3/2}$ row as withdrawn history and record $4.1$ as the current published upper bound (Schmidt's unpublished $3.65*$ is unchanged).

Closes one item of #168.

Test plan

• Compared the abs comments field and v2 Theorem 4.5
• README table arity

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