Fix react2shell exploit

Author: theoribbi

package.json

@@ -37,7 +37,7 @@
     "mdx": "^0.3.1",
     "mdx-components": "^1.0.1",
     "mini-svg-data-uri": "^1.4.4",
-    "next": "15.2.3",
+    "next": "15.2.6",
     "next-mdx-remote": "^5.0.0",
     "next-themes": "^0.4.6",
     "prism-react-renderer": "^2.4.1",