fix(deps): update dependency zod to v4

Author: renovate[bot]

package.json

@@ -37,7 +37,7 @@
     "@actions/core": "^1.10.1",
     "@actions/exec": "^1.1.1",
     "ini": "^5.0.0",
-    "zod": "^3.23.8"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@tsconfig/recommended": "^1.0.7",