chore(deps): update dependency tsdown to v0.20.2

Author: renovate[bot]

package.json

@@ -72,7 +72,7 @@
     "lint-staged": "16.2.7",
     "oxfmt": "0.28.0",
     "ts-node": "10.9.2",
-    "tsdown": "0.18.4",
+    "tsdown": "0.20.2",
     "tsx": "4.21.0",
     "turbo": "2.8.3",
     "typescript": "5.9.3",