chore(deps): update typescript-eslint monorepo to v8

Author: renovate[bot]

package.json

@@ -68,8 +68,8 @@
     "@types/react": "^18.2.73",
     "@types/rss": "0.0.32",
     "@types/string-similarity": "^4.0.2",
-    "@typescript-eslint/eslint-plugin": "7.18.0",
-    "@typescript-eslint/parser": "7.18.0",
+    "@typescript-eslint/eslint-plugin": "8.21.0",
+    "@typescript-eslint/parser": "8.21.0",
     "eslint": "8.57.1",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-mdx": "^3.1.5",