quiet linea false positives

[m4sterbunny]

Note

Low Risk
Low risk: only adjusts docs spelling/capitalization rules to reduce false positives; no production code or runtime behavior changes.

Overview
Updates the docs spelling-check configuration to reduce false positives and enforce preferred terminology/capitalization.

Adds a case-sensitive substitution for beacon → "Beacon", expands heading capitalization exceptions to include Linea Yield Boost/Yield Boost, and extends the accepted vocabulary with new terms/regexes (e.g., LPs, rebalanc*, stVaults?, unstak*, and Yield Boost).

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