build(deps): bump astro from 6.4.2 to 6.4.7

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 6.4.2 to 6.4.7.
- [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@6.4.7/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 6.4.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -16,7 +16,7 @@
         "@astrojs/markdown-remark": "^7.2.0",
         "@astrojs/starlight": "^0.40.0",
         "@types/mdast": "^4.0.4",
-        "astro": "^6.4.2",
+        "astro": "^6.4.7",
         "astro-rehype-relative-markdown-links": "^0.19.0",
         "remark": "^15.0.1",
         "sharp": "^0.35.1",