Add Vale vocabulary terms from llmstxt.mdx

[mintlify]

Summary

Adds valid technical terms flagged by Vale spelling checks in the recently merged llms.txt documentation:

• AEO - Answer Engine Optimization
• GEO - Generative Engine Optimization
• llmstxt - llms.txt standard identifier
• sitemaps - Standard web term (with optional plural)

These terms appear in ai/llmstxt.mdx (merged in #4243).

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Note

Low Risk
Low risk: only updates Vale’s accepted vocabulary list, affecting documentation linting/spellcheck behavior but not runtime code.

Overview
Updates Vale’s Mintlify accepted vocabulary (.vale/styles/config/vocabularies/Mintlify/accept.txt) to allow additional documentation terms: AEO, GEO, llmstxt, and sitemaps? (plural-safe regex), reducing false-positive spelling errors in docs.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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Vocabulary term breaks alphabetical order between SDK entries

Low Severity

The sitemaps? entry is inserted between SDK and SDKs, breaking their logical grouping and the section's case-insensitive alphabetical ordering. Based on the established sort order, sitemaps? belongs between Singleline and skimmable, keeping the SDK/SDKs pair adjacent and the list consistently sorted for maintainability.