build(deps): bump the docs-dependencies group across 1 directory with 2 updates (#1156)

Bumps the docs-dependencies group with 2 updates in the /docs 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 0.26.1 to 0.26.3
- [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 4.15.1 to 4.15.3
- [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-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docs-dependencies
- dependency-name: astro
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docs-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/package.json

@@ -10,11 +10,11 @@
   },
   "dependencies": {
     "@astrojs/check": "^0.9.3",
-    "@astrojs/starlight": "^0.26.1",
+    "@astrojs/starlight": "^0.26.3",
     "@astrojs/starlight-tailwind": "^2.0.2",
     "@astrojs/tailwind": "^5.1.0",
     "@fontsource-variable/inter": "^5.0.20",
-    "astro": "^4.15.1",
+    "astro": "^4.15.3",
     "sharp": "^0.33.5",
     "tailwindcss": "^3.4.10",
     "typescript": "^5.5.4"