doc(unstable-book): fix typo "earier" -> "earlier" in default-visibility flag

[Dodothereal]

Summary

Fix a small typo (earier → earlier) in the unstable-book documentation for the -Zdefault-visibility flag.

This is detected by the project's typos configuration (./x test tidy --extra-checks=spellcheck) and would emit a CI warning on the next run.

Diff

-using `-Zdefault-visibility=interposable` will cause symbols to be emitted with "default"
-visibility. On platforms that support it, this makes it so that symbols can be interposed, which
-means that they can be overridden by symbols with the same name from the executable or by other
-shared objects earier in the load order.
+using `-Zdefault-visibility=interposable` will cause symbols to be emitted with "default"
+visibility. On platforms that support it, this makes it so that symbols can be interposed, which
+means that they can be overridden by symbols with the same name from the executable or by other
+shared objects earlier in the load order.

AI assistance

This patch was drafted with the help of an AI coding assistant, then reviewed line-by-line before submission. This is the only change in the diff.

[rustbot]

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[Dodothereal]

Hi @wesleywiser — this is a trivial typo fix ("earier" -> "earlier") in the unstable-book page for default-visibility. Since it touches only markdown in src/doc, no CLI impact. Happy to adjust phrasing or PR description if needed. Otherwise, please review whenever convenient.

[wesleywiser]

@bors r+ rollup

[rust-bors]

📌 Commit c247067 has been approved by wesleywiser

It is now in the queue for this repository.