build(deps-dev): bump vitepress from 2.0.0-alpha.19 to 2.0.0-alpha.20 in the npm-dependencies group

[dependabot]

Bumps the npm-dependencies group with 1 update: vitepress.

Updates vitepress from 2.0.0-alpha.19 to 2.0.0-alpha.20

Release notes

Sourced from vitepress's releases.

v2.0.0-alpha.20

Please refer to CHANGELOG.md for details.

Changelog

Sourced from vitepress's changelog.

2.0.0-alpha.20 (2026-09-04)

Bug Fixes

• harden eager frontmatter interpolation (#5413) (09f9672)
• key head entries by id and ignore meta content when deduping (b18f306), closes #5362 #5363 #5379
• search: respect per-locale markdown options (#5351) (27c4a1a)
• serialize config functions as code, not strings revived via new Function (close #3685) (d3b2957)
• theme/regression: fix misaligned external link icon (2be52f0)
• theme: adjust z-index for VPNavBar and simplify VPNavScreen styles (#5374) (35cf647)
• theme: cover the external link icon's paint box with its mask (39b8f9f)
• theme: drop the -webkit-backdrop-filter fallbacks (a2a0a92)
• theme: fix menu dropdown group dividers (#5365) (49c84f5)
• theme: fix nav screen and divider appearance (#5369) (a0401ee)
• theme: fix social links spacing in dropdown (#5370) (cb636b2)
• theme: handle outline bottom overscroll (#5375) (3fe901d)
• theme: keep search beside the title without a nav menu (14f4f09)
• theme: keep the search keycap glyphs out of the DOM text (60f656b), closes #5401
• theme: mark current navigation links (#5395) (0f0fe13)
• theme: paint the navbar divider on its own layer (9bebd09), closes #5399
• theme: prevent layout shifts when locking page scroll (310679a), closes #5386
• theme: prevent scroll chaining in local nav outline dropdown (#5367) (0a96bae)
• theme: remove extra margins from first and last paragraph inside a list element (8dbd782), closes #5353
• theme: render sidebar active state during ssr (005aa5c)
• theme: render sidebar group toggles as native buttons (ed2bfb2), closes #5366 #5371
• theme: rendering of sponsor and team components inside vp-doc containers (#4493) (b7602df)
• theme: treat negative scrollY as top (#5368) (9d521db)
• theme: use a getter as VPSidebar's open watch source (9aeeb4f)
• theme: use relative length units to auto-close nav screen menu (#5387) (c197979)

Features

• cli: make shortcuts case-insensitive (#5378) (4ffcdae)
• hashed icon styles, offline dev icons, arbitrary iconify collections (#5407) (d00a5e0)
• relative base (./) and assetsBase (CDN prefix) (#5406) (feadd9f)
• resolve $frontmatter expressions while rendering markdown (#5412) (a1eb284)
• ssr: enable throwUnhandledErrorInProduction (#5419) (a6573ff)
• theme: add --vp-local-nav-divider-color (110209d)
• theme: add opt-in severity-based colors for containers, alerts, and badges (#5373) (45cb85e)
• theme: redesign the navbar (#5397) (26b76d6)
• theme: scroll toc if active item is out of view (#5377) (72534af)
• theme: un-deprecate Theme.setup and compose it across extends (#5404) (ebbd48c)
• theme: use relative length units (#5323) (2a91caa)

Commits

• 22b64ff release: v2.0.0-alpha.20
• dcf7fda chore: named imports don't work with json natively
• a6573ff feat(ssr): enable throwUnhandledErrorInProduction (#5419)
• 09f9672 fix: harden eager frontmatter interpolation (#5413)
• a1eb284 feat: resolve $frontmatter expressions while rendering markdown (#5412)
• 73bbaea chore: replace lodash.template with eta (#5411)
• 1a702fd docs: fix the appearance toggle example
• 7de3cae chore: generate third-party license notices for bundled deps (#5408)
• d00a5e0 feat: hashed icon styles, offline dev icons, arbitrary iconify collections (#...
• d3b2957 fix: serialize config functions as code, not strings revived via new Function...
• Additional commits viewable in compare view

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