fix(deps): update dependency @astrojs/starlight to ^0.29.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@astrojs/starlight (source)	^0.28.0 -> ^0.29.0

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Release Notes

withastro/starlight (@​astrojs/starlight)

v0.29.0

Compare Source

Minor Changes

• #​2551 154c8e3 Thanks @​hippotastic! - Updates the astro-expressive-code dependency to the latest version (0.38).

  The new version allows using ec.config.mjs to selectively override individual Expressive Code styles and settings provided by Starlight themes and plugins, speeds up Shiki language loading, and adds the config option expressiveCode.shiki.injectLangsIntoNestedCodeBlocks. See the Expressive Code release notes for full details.

• #​2252 6116db0 Thanks @​HiDeoo! - Improves build performance for sites with large sidebars

  This release adds a caching layer to Starlight’s sidebar generation logic, reducing the number of times sidebars need to be regenerated while building a site. Some benchmarks for projects with a complex sidebar saw builds complete more than 35% faster with this change.

• #​2503 a4c8edd Thanks @​HiDeoo! - Improves the accessibility of asides and tabs by removing some unnecessary HTML landmarks.

Patch Changes

• #​2579 241966b Thanks @​RafidMuhymin! - Adds social link icon for Nostr

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