fix(deps): Update dependency rolldown-plugin-dts to v0.18.0

Author: renovate[bot]

packages/@sanity/pkg-utils/package.json

@@ -101,7 +101,7 @@
     "recast": "^0.23.11",
     "rimraf": "^6.1.0",
     "rolldown": "1.0.0-beta.50",
-    "rolldown-plugin-dts": "0.17.8",
+    "rolldown-plugin-dts": "0.18.0",
     "rollup": "^4.53.3",
     "rollup-plugin-esbuild": "^6.2.1",
     "rxjs": "^7.8.2",