build(deps): bump the starlight_astro group with 2 updates (#9060)

Bumps the starlight_astro group with 2 updates: [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight) and [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro).


Updates `@astrojs/starlight` from 0.35.1 to 0.35.2
- [Release notes](https://github.com/withastro/starlight/releases)
- [Changelog](https://github.com/withastro/starlight/blob/main/packages/starlight/CHANGELOG.md)
- [Commits](https://github.com/withastro/starlight/commits/@astrojs/[email protected]/packages/starlight)

Updates `astro` from 5.12.3 to 5.12.8
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/[email protected]/packages/astro)

---
updated-dependencies:
- dependency-name: "@astrojs/starlight"
  dependency-version: 0.35.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: starlight_astro
- dependency-name: astro
  dependency-version: 5.12.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: starlight_astro
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/astro/package.json

@@ -19,10 +19,10 @@
   },
   "dependencies": {
     "@astrojs/check": "0.9.4",
-    "@astrojs/starlight": "0.35.1",
+    "@astrojs/starlight": "0.35.2",
     "@expressive-code/plugin-line-numbers": "0.41.3",
     "@types/node": "20.16.10",
-    "astro": "5.12.3",
+    "astro": "5.12.8",
     "astro-embed": "0.9.0",
     "playwright-ctrf-json-reporter": "0.0.22",
     "rehype-external-links": "3.0.0",