fix: apps/portal/package.json to reduce vulnerabilities (#150)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-INFLIGHT-6095116

Co-authored-by: snyk-bot <[email protected]>

Author: AU_gdev_19

apps/portal/package.json

@@ -68,7 +68,7 @@
     "@typescript-eslint/eslint-plugin": "7.14.1",
     "@typescript-eslint/parser": "7.14.1",
     "autoprefixer": "^10.4.21",
-    "eslint": "8.57.0",
+    "eslint": "9.0.0",
     "eslint-config-biome": "1.9.4",
     "eslint-plugin-mdx": "3.4.0",
     "eslint-plugin-svg-jsx": "^1.2.4",