chore(deps): bump astro from 5.11.0 to 5.12.8

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.11.0 to 5.12.8.
- [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)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.12.8
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -50,7 +50,7 @@
     "@shikijs/twoslash": "^3.8.0",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
-    "astro": "5.11.0",
+    "astro": "5.12.8",
     "astro-remote": "^0.3.4",
     "astro-typst": "0.11.2",
     "bilibili-bv-av-convert": "^1.0.0",