fix(deps): update dependency zod to v4

Author: renovate[bot]

package-lock.json

@@ -10,7 +10,7 @@
     "@octokit/graphql": "^8.1.1",
     "@octokit/webhooks-types": "^7.6.1",
     "yaml": "^2.7.0",
-    "zod": "^3.24.2"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@types/node": "20.17.30",