fix(deps): update dependency next to v15.3.0 (ardatan#7115)

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

Author: renovate[bot]

website/package.json

@@ -12,7 +12,7 @@
   },
   "dependencies": {
     "@theguild/components": "9.7.0",
-    "next": "15.2.5",
+    "next": "15.3.0",
     "next-sitemap": "4.2.3",
     "react": "19.1.0",
     "react-dom": "19.1.0"