chore(deps): update dependency tsdown to v0.21.5

Author: renovate[bot]

packages/pangea-node-sdk/package.json

@@ -48,7 +48,7 @@
     "msw": "2.12.14",
     "publint": "0.3.12",
     "start-server-and-test": "2.1.5",
-    "tsdown": "0.21.4",
+    "tsdown": "0.21.5",
     "typedoc": "^0.28.18",
     "typescript": "5.9.3",
     "vite-tsconfig-paths": "6.1.1",