Bump zod in /packages/worker in the prod-deps group across 1 directory

Bumps the prod-deps group with 1 update in the /packages/worker directory: [zod](https://github.com/colinhacks/zod).


Updates `zod` from 3.25.76 to 4.1.12
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Commits](colinhacks/zod@v3.25.76...v4.1.12)

---
updated-dependencies:
- dependency-name: zod
  dependency-version: 4.1.12
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: prod-deps
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/worker/package.json

@@ -53,7 +53,7 @@
 		"mimetext": "^3.0.27",
 		"postal-mime": "^2.6.0",
 		"workers-qb": "^1.11.2",
-		"zod": "^3.25.76"
+		"zod": "^4.1.12"
 	},
 	"devDependencies": {
 		"@cloudflare/vitest-pool-workers": "^0.10.0",