Bump astro from 5.15.4 to 5.15.6

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.15.4 to 5.15.6.
- [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: 5.15.6
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package-lock.json

@@ -12,7 +12,7 @@
     "@astrojs/react": "^4.4.2",
     "@gsap/react": "^2.1.2",
     "@use-it/interval": "^1.0.0",
-    "astro": "^5.15.4",
+    "astro": "^5.15.6",
     "clsx": "^2.1.1",
     "framer-motion": "^12.23.24",
     "gsap": "^3.13.0",