fix(deps-dev): bump the astro-and-starlight group across 1 directory with 2 updates

Bumps the astro-and-starlight group with 2 updates in the / directory: [@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 0.42.6 to 0.42.8
- [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/starlight@0.42.8/packages/starlight)

Updates `astro` from 7.4.2 to 7.4.5
- [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/astro@7.4.5/packages/astro)

---
updated-dependencies:
- dependency-name: "@astrojs/starlight"
  dependency-version: 0.42.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: astro-and-starlight
- dependency-name: astro
  dependency-version: 7.4.5
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: astro-and-starlight
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "build:docs": "astro build"
   },
   "devDependencies": {
-    "@astrojs/starlight": "0.42.6",
+    "@astrojs/starlight": "0.42.8",
     "astro": "^7.2.9",
     "micromark": "^4.0.1",
     "oxfmt": "^0.75.0",