Update typescript-eslint monorepo to v8.20.0

Author: renovate[bot]

eslint-config-typescript/package-lock.json

@@ -16,8 +16,8 @@
   },
   "devDependencies": {
     "@openmfp/config-prettier": "0.5.0",
-    "@typescript-eslint/eslint-plugin": "8.19.1",
-    "@typescript-eslint/parser": "8.19.1",
+    "@typescript-eslint/eslint-plugin": "8.20.0",
+    "@typescript-eslint/parser": "8.20.0",
     "eslint": "9.18.0",
     "eslint-config-prettier": "9.1.0",
     "eslint-plugin-jest": "28.10.0",