chore(astro): Update dependency astro to ^5.15.3 (#7180)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/astro/package.json

@@ -95,7 +95,7 @@
     "nanostores": "1.0.1"
   },
   "devDependencies": {
-    "astro": "^5.14.8"
+    "astro": "^5.15.3"
   },
   "peerDependencies": {
     "astro": "^4.15.0 || ^5.0.0"