chore(deps): update dependency tsdown to ^0.16.6

Author: renovate[bot]

pnpm-workspace.yaml

@@ -11,7 +11,7 @@ catalogs:
     prettier: ^3.6.2
     publint: ^0.3.15
     simple-git-hooks: ^2.13.1
-    tsdown: ^0.15.12
+    tsdown: ^0.16.6
     typescript: ^5.9.3
     unplugin-unused: ^0.5.4