fix(deps): update fumadocs to v16.0.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
fumadocs-core (source)	16.0.7 -> 16.0.8
fumadocs-ui (source)	16.0.7 -> 16.0.8

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Release Notes

fuma-nama/fumadocs (fumadocs-core)

v16.0.8

Compare Source

Patch Changes

• bc97236: Fix rehypeCode() tsdoc for lazy option
• ca09b6a: Core: Support accessing MDX plugins separately at fumadocs-core/mdx-plugins/*
• 117ad86: Add support for using a custom GitHub API base URL

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