Bump tsdown from 0.21.0-beta.2 to 0.21.0-beta.3 (#30)

Author: dependabot[bot]

package.json

@@ -57,7 +57,7 @@
 		"oxlint-tsgolint": "^0.15.0",
 		"prettier": "^3.8.1",
 		"publint": "^0.3.18",
-		"tsdown": "0.21.0-beta.2",
+		"tsdown": "0.21.0-beta.3",
 		"typescript": "^5.9.3",
 		"vitest": "^4.0.18"
 	},