Update worker-loader binding config format.

Author: kentonv

src/content/docs/workers/runtime-apis/bindings/worker-loader.mdx

@@ -86,9 +86,8 @@ To add a dynamic worker loader binding to your worker, add it to your Wrangler c
 <WranglerConfig>
 
 ```toml
-[[unsafe.bindings]]
-name = "LOADER"
-type = "worker-loader"
+[[worker_loaders]]
+binding = "LOADER"
 ```
 
 </WranglerConfig>