build(deps): bump astro from 5.5.4 to 5.5.6

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.5.4 to 5.5.6.
- [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: 5.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -18,7 +18,7 @@
     "@astrojs/check": "^0.9.4",
     "@astrojs/rss": "^4.0.11",
     "@resvg/resvg-js": "^2.6.2",
-    "astro": "^5.5.4",
+    "astro": "^5.5.6",
     "fuse.js": "^7.0.0",
     "github-slugger": "^2.0.0",
     "mdast-util-to-string": "^4.0.0",