fix build

Author: essential-randomness

astro-ao3-loader/package.json

@@ -37,6 +37,7 @@
     "@bobaboard/ao3.js": "^0.17.0",
     "@types/node": "^22.8.2",
     "astro": "^4.16.7",
+    "yaml": "^2.8.2",
     "zod": "^3.23.8"
   },
   "publishConfig": {