chore(deps): update dependency tsdown to v0.21.9 (#59)

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

Author: renovate[bot]

package.json

@@ -54,7 +54,7 @@
     "devDependencies": {
         "@zenstackhq/orm": "3.5.6",
         "eslint": "10.2.0",
-        "tsdown": "0.21.8",
+        "tsdown": "0.21.9",
         "typescript": "6.0.2",
         "typescript-eslint": "8.58.2",
         "vitest": "4.1.4"