Update dependencies of "miniflare", "wrangler"

The following dependency versions have been updated:

| Dependency                | From          | To            |
| ------------------------- | ------------- | ------------- |
| @cloudflare/workers-types | ^5.20260923.1 | ^5.20260925.1 |
| workerd                   | 1.20260923.1  | 1.20260925.1  |

Author: Wrangler automated PR updater

.changeset/dependabot-update-15864.md

@@ -0,0 +1,13 @@
+---
+"miniflare": patch
+"wrangler": patch
+---
+
+Update dependencies of "miniflare", "wrangler"
+
+The following dependency versions have been updated:
+
+| Dependency                | From          | To            |
+| ------------------------- | ------------- | ------------- |
+| @cloudflare/workers-types | ^5.20260923.1 | ^5.20260925.1 |
+| workerd                   | 1.20260923.1  | 1.20260925.1  |

packages/workers-utils/src/default-compat-date.ts

@@ -19,4 +19,4 @@ import type { CompatDate } from "./compatibility-date";
  * @see https://github.com/cloudflare/workerd/blob/main/src/workerd/io/BUILD.bazel
  * @see https://github.com/cloudflare/workerd/blob/main/src/workerd/io/compatibility-date.c%2B%2B
  */
-export const DEFAULT_COMPAT_DATE: CompatDate = "2026-09-23";
+export const DEFAULT_COMPAT_DATE: CompatDate = "2026-09-25";