chore(deps): bump the npm group with 2 updates (#1138)

Bumps the npm group with 2 updates: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) and [prettier](https://github.com/prettier/prettier).


Updates `astro` from 6.1.5 to 6.1.8
- [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)

Updates `prettier` from 3.8.2 to 3.8.3
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@3.8.2...3.8.3)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 6.1.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm
- dependency-name: prettier
  dependency-version: 3.8.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm
...

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

Author: dependabot[bot]

package-lock.json

@@ -16,11 +16,11 @@
   "dependencies": {
     "@astrojs/sitemap": "^3.7.2",
     "@astrojs/starlight": "^0.38.3",
-    "astro": "^6.1.5",
+    "astro": "^6.1.8",
     "sharp": "^0.34.5"
   },
   "devDependencies": {
-    "prettier": "^3.8.2",
+    "prettier": "^3.8.3",
     "prettier-plugin-astro": "^0.14.0"
   }
 }