fix(deps): update dependency @slack/webhook to v7

Author: renovate[bot]

package-lock.json

@@ -23,7 +23,7 @@
     "prepare": "husky install"
   },
   "dependencies": {
-    "@slack/webhook": "^6.1.0",
+    "@slack/webhook": "^7.0.0",
     "@types/lodash": "^4.14.179",
     "@types/node": "^22",
     "@typescript-eslint/eslint-plugin": "^5.14.0",