chore(deps): update devdependency tsdown to ^0.5.6

Author: renovate[bot]

package.json

@@ -68,7 +68,7 @@
     "rolldown": "^1.0.0-beta.3",
     "rollup": "^4.32.1",
     "simple-git-hooks": "^2.11.1",
-    "tsdown": "^0.5.5",
+    "tsdown": "^0.5.6",
     "typescript": "~5.7.3",
     "unplugin": "workspace:*",
     "vite": "^6.0.11",