Fix build by downgrading esbuild

Author: wooorm

package.json

@@ -56,7 +56,7 @@
     "@types/react": "^18.0.0",
     "@types/react-dom": "^18.0.0",
     "c8": "^10.0.0",
-    "esbuild": "^0.23.0",
+    "esbuild": "^0.21.0",
     "estree-util-visit": "^2.0.0",
     "hastscript": "^9.0.0",
     "prettier": "^3.0.0",