build(deps-dev): bump @types/bun from 1.3.8 to 1.3.9

Bumps [@types/bun](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/bun) from 1.3.8 to 1.3.9.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/bun)

---
updated-dependencies:
- dependency-name: "@types/bun"
  dependency-version: 1.3.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

bun.lock

@@ -36,7 +36,7 @@
   },
   "devDependencies": {
     "@sentry/cli": "^3.1.0",
-    "@types/bun": "^1.3.8",
+    "@types/bun": "^1.3.9",
     "@types/express": "^5.0.6",
     "@types/node": "^25.2.3",
     "@typescript-eslint/eslint-plugin": "^8.56.0",