chore(deps): update dependency tsdown to v0.21.8

Author: renovate[bot]

package.json

@@ -77,7 +77,7 @@
     "lint-staged": "16.4.0",
     "oxfmt": "0.45.0",
     "publint": "0.3.18",
-    "tsdown": "0.21.7",
+    "tsdown": "0.21.8",
     "tsx": "4.21.0",
     "turbo": "2.9.6",
     "typescript": "6.0.2",