chore(deps): update dependency rust-lang/mdbook to v0.4.37

This MR contains the following updates:

Package	Update	Change	OpenSSF
rust-lang/mdBook	patch	v0.4.36 -> v0.4.37

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Release Notes

rust-lang/mdBook (rust-lang/mdBook)

v0.4.37

Compare Source

See https://github.com/rust-lang/mdBook/blob/master/CHANGELOG.md#mdbook-0437 for a complete list of changes.

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