fix(deps): update external major

Author: renovate[bot]

package.json

@@ -102,7 +102,7 @@
     "psl": "1.15.0",
     "slack-block-builder": "2.8.0",
     "urijs": "1.19.11",
-    "zod": "3.25.76"
+    "zod": "4.0.8"
   },
   "devDependencies": {
     "@adobe/eslint-config-helix": "2.0.9",
@@ -120,7 +120,7 @@
     "c8": "10.1.3",
     "chai": "5.2.1",
     "chai-as-promised": "8.0.1",
-    "dotenv": "16.6.1",
+    "dotenv": "17.2.0",
     "eslint": "8.57.1",
     "esmock": "2.7.1",
     "form-data": "4.0.4",