Update eslint-config-next to 15.4.7 to match Next.js version

Keeps eslint-config-next synchronized with Next.js 15.4.7 for
optimal compatibility while maintaining stable ESLint 8.57.1.

Author: jhodapp

package-lock.json

@@ -92,7 +92,7 @@
     "@vitest/ui": "^2.1.9",
     "autoprefixer": "^10.4.20",
     "eslint": "^8.57.1",
-    "eslint-config-next": "15.3.5",
+    "eslint-config-next": "15.4.7",
     "jsdom": "^26.1.0",
     "msw": "^2.10.3",
     "postcss": "^8.4.49",