chore(deps): update dependency tsdown to v0.21.9 (main) (#42842)

chore(deps): update dependency tsdown to v0.21.9

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| npm        | tsdown  | 0.21.8 | 0.21.9 |

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -341,7 +341,7 @@
     "semantic-release": "25.0.3",
     "tar": "7.5.13",
     "tmp-promise": "3.0.3",
-    "tsdown": "0.21.8",
+    "tsdown": "0.21.9",
     "type-fest": "5.5.0",
     "typescript": "6.0.2",
     "unified": "11.0.5",