Improve quickstart guide accuracy

[mintlify]

Updated the quickstart guide to align with terminology and phrasing used in other documentation pages. Made several accuracy improvements including clarifying the GitHub App name, specifying the mintlify-community organization, and standardizing language around Node.js requirements and deployment processes.

Changes:

• Clarified "GitHub App" to "Mintlify GitHub App"
• Specified mintlify-community organization instead of generic "private organization"
• Aligned Node.js requirement phrasing with installation.mdx
• Improved preview command instructions for better clarity
• Clarified when automatic deployments trigger
• Minor grammar improvements for consistency

Files changed:

• quickstart.mdx

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Note

Low Risk
Documentation-only wording updates; no runtime or behavioral changes.

Overview
Improves quickstart.mdx accuracy and consistency by clarifying onboarding terminology (explicitly naming the Mintlify GitHub App and the mintlify-community org when skipping GitHub connection).

Tightens and standardizes setup instructions, including Node.js requirement phrasing, clearer local preview steps (run mint dev from the directory with docs.json), and more explicit wording about when automatic deployments trigger and how to confirm them in the dashboard.

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