Bump the workerd-and-workers-types group with 2 updates (#15436)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Wrangler automated PR updater <wrangler@cloudflare.com>

Author: dependabot[bot]

.changeset/dependabot-update-15436.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 | ^5.20260828.1 | ^5.20260831.1 |
+| workerd                   | 1.20260828.1  | 1.20260831.1  |

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 = "2026-08-28";
+export const DEFAULT_COMPAT_DATE: CompatDate = "2026-08-31";