chore(deps): update dependency tsdown>rolldown-plugin-dts to v0.21.1

Author: renovate[bot]

package.json

@@ -122,7 +122,7 @@
   "pnpm": {
     "overrides": {
       "tsdown>rolldown": "1.0.0-beta.60",
-      "tsdown>rolldown-plugin-dts": "0.20.0",
+      "tsdown>rolldown-plugin-dts": "0.21.1",
       "vitepress>vite": "npm:[email protected]"
     },
     "onlyBuiltDependencies": [