chore(deps): bump astro from 4.15.6 to 4.15.8 in /web

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 4.15.6 to 4.15.8.
- [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/astro@4.15.8/packages/astro)

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

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

web/package.json

@@ -20,7 +20,7 @@
     "@astrojs/sitemap": "^3.1.6",
     "@astrojs/vue": "^4.5.0",
     "@fontsource/poppins": "^5.1.0",
-    "astro": "^4.15.6",
+    "astro": "^4.15.8",
     "vue": "^3.5.5"
   },
   "devDependencies": {