Use latest Anthropic Sonnet 3.5 model

It's more powerful than the previous version:
https://www.anthropic.com/news/3-5-models-and-computer-use

app/lib/.server/llm/model.ts

@@ -5,5 +5,5 @@ export function getAnthropicModel(apiKey: string) {
     apiKey,
   });
 
-  return anthropic('claude-3-5-sonnet-20240620');
+  return anthropic('claude-3-5-sonnet-20241022');
 }