Bump astro from 5.7.10 to 5.8.1 in /docs

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.7.10 to 5.8.1.
- [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@5.8.1/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

docs/package-lock.json

@@ -16,7 +16,7 @@
   "license": "MIT",
   "dependencies": {
     "@alephdata/followthemoney": "^3.8.2",
-    "astro": "^5.7.10",
+    "astro": "^5.8.1",
     "astro-theme-docs": "github:alephdata/astro-theme-docs",
     "unist-util-visit": "^5.0.0"
   },