build(deps-dev): bump @types/bun from 1.2.20 to 1.2.21

Bumps [@types/bun](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/bun) from 1.2.20 to 1.2.21.
- [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: 1.2.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -78,7 +78,7 @@
 		"@sinclair/typemap": "^0.10.1",
 		"@apidevtools/swagger-parser": "^12.0.0",
 		"@scalar/types": "^0.2.13",
-		"@types/bun": "1.2.20",
+		"@types/bun": "1.2.21",
 		"elysia": "1.4.0-exp.16",
 		"eslint": "9.6.0",
 		"openapi-types": "^12.1.3",