Add anthropic toolChoice property doc

Signed-off-by: Christian Tzolov <[email protected]>

Author: tzolov

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

@@ -157,6 +157,7 @@ The prefix `spring.ai.anthropic.chat` is the property prefix that lets you confi
 | spring.ai.anthropic.chat.options.top-k | Only sample from the top K options for each subsequent token. Used to remove "long tail" low probability responses. Learn more technical details here. Recommended for advanced use cases only. You usually only need to use temperature. | -
 | spring.ai.anthropic.chat.options.tool-names | List of tools, identified by their names, to enable for tool calling in a single prompt requests. Tools with those names must exist in the toolCallbacks registry. | -
 | spring.ai.anthropic.chat.options.tool-callbacks | Tool Callbacks to register with the ChatModel. | -
+| spring.ai.anthropic.chat.options.toolChoice | Controls which (if any) tool is called by the model. `none` means the model will not call a function and instead generates a message. `auto` means the model can pick between generating a message or calling a tool. Specifying a particular tool via `{"type: "tool", "name": "my_tool"}` forces the model to call that tool. `none` is the default when no functions are present. `auto` is the default if functions are present. | -
 | spring.ai.anthropic.chat.options.internal-tool-execution-enabled | If false, the Spring AI will not handle the tool calls internally, but will proxy them to the client. Then it is the client's responsibility to handle the tool calls, dispatch them to the appropriate function, and return the results. If true (the default), the Spring AI will handle the function calls internally. Applicable only for chat models with function calling support | true
 | spring.ai.anthropic.chat.options.http-headers | Optional HTTP headers to be added to the chat completion request. | -
 |====