fix: disable topK for anthropic streaming model

Author: John Law

model-providers/anthropic/runtime/src/main/java/io/quarkiverse/langchain4j/anthropic/runtime/AnthropicRecorder.java

@@ -141,6 +141,10 @@ public Supplier<StreamingChatModel> streamingChatModel(String configName) {
 
             ChatModelConfig.ThinkingConfig thinkingConfig = chatModelConfig.thinking();
             if (thinkingConfig.type().isPresent()) {
+                if (chatModelConfig.topK().isPresent()) {
+                    LOG.warn("TopK was not configured because thinking was enabled");
+                }
+                builder.topK(null);
                 builder.thinkingType(thinkingConfig.type().get());
             }