Update anthropic-chat.adoc (spring-projects#2723)

AnthropicChatModel does not provide a constructor with two parameters. 
If there are two parameters, use the Builder to construct an AnthropicChatModel. 
The current document misleads users and needs to be updated.

Fixes spring-projects#2723

Auto-cherry-pick to 1.0.x

Signed-off-by: Lpepsi <[email protected]>

Author: WRCoding

spring-ai-docs/src/main/antora/modules/ROOT/pages/api/chat/anthropic-chat.adoc

@@ -484,13 +484,13 @@ Next, create a `AnthropicChatModel` and use it for text generations:
 [source,java]
 ----
 var anthropicApi = new AnthropicApi(System.getenv("ANTHROPIC_API_KEY"));
-
-var chatModel = new AnthropicChatModel(this.anthropicApi,
-        AnthropicChatOptions.builder()
-            .model("claude-3-opus-20240229")
+var anthropicChatOptions = AnthropicChatOptions.builder()
+            .model("claude-3-7-sonnet-20250219")
             .temperature(0.4)
             .maxTokens(200)
-        .build());
+        .build()
+var chatModel = AnthropicChatModel.builder().anthropicApi(anthropicApi)
+                .defaultOptions(anthropicChatOptions).build();
 
 ChatResponse response = this.chatModel.call(
     new Prompt("Generate the names of 5 famous pirates."));