Clarify that `false` still affects the render tree by occupying a position

[enterprisey]

From https://stackoverflow.com/questions/70253988/react-resetting-and-preserving-state and https://stackoverflow.com/questions/77718975/why-would-two-react-components-seemingly-in-the-same-position-get-different-stat, it seems that the "Resetting state at the same position" section has confused a few people, including myself. I have clarified the text to hopefully reduce the chance of this confusion, which centers around whether the false created by the evaluation of the && expression influences the calculated positions in the render tree.

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Size changes

📦 Next.js Bundle Analysis for react-dev

This analysis was generated by the Next.js Bundle Analysis action. 🤖

Three Pages Changed Size

The following pages changed size from the code in this PR compared to its base branch:

Page	Size (compressed)	First Load
/404	77.36 KB (🟢 -17 B)	181.18 KB
/500	77.36 KB (🟢 -17 B)	181.17 KB
/[[...markdownPath]]	78.95 KB (🟢 -17 B)	182.77 KB

Details

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