chore(deps): bump and fix changes needed for the latest flat version

Author: zimeg

package-lock.json

@@ -38,7 +38,7 @@
     "@slack/web-api": "^7.7.0",
     "axios": "^1.7.7",
     "axios-retry": "^4.5.0",
-    "flat": "^5.0.2",
+    "flat": "^6.0.1",
     "https-proxy-agent": "^7.0.5",
     "js-yaml": "^4.1.0",
     "markup-js": "^1.5.21"

package.json

@@ -1,7 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import github from "@actions/github";
-import flatten from "flat";
+import { flatten } from "flat";
 import yaml from "js-yaml";
 import markup from "markup-js";
 import Config from "./config.js";