Bump eslint-config-next from 15.5.7 to 15.5.9 in the eslint group

Bumps the eslint group with 1 update: [eslint-config-next](https://github.com/vercel/next.js/tree/HEAD/packages/eslint-config-next).


Updates `eslint-config-next` from 15.5.7 to 15.5.9
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/commits/v15.5.9/packages/eslint-config-next)

---
updated-dependencies:
- dependency-name: eslint-config-next
  dependency-version: 15.5.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: eslint
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -70,7 +70,7 @@
     "es-check": "^9.5.2",
     "esbuild": "0.27.1",
     "eslint": "^9.39.1",
-    "eslint-config-next": "15.5.7",
+    "eslint-config-next": "15.5.9",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-compat": "^6.0.2",
     "jest": "^30.2.0",