chore(monorepo): update pnpm.catalog.default astro to ^5.15.6 [security]

Author: renovate[bot]

packages/core/package.json

@@ -922,7 +922,7 @@
     "@rspack/cli": "^1.3.8",
     "@rspack/core": "^1.3.8",
     "@storm-stack/tsdoc": "*",
-    "astro": "^5.13.5",
+    "astro": "^5.15.6",
     "rolldown": "^1.0.0-beta.41",
     "rollup": "^4.52.3",
     "vite": "^7.1.7",