Update tools.adoc (#3468)

There shouldn't be a method here.

Fixes #3468

Signed-off-by: qwp_p <[email protected]>
(cherry picked from commit 23c38df)

Author: RobinElysia

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

@@ -316,7 +316,7 @@ The `ToolMetadata.Builder` allows you to build a `ToolMetadata` instance and def
 ----
 Method method = ReflectionUtils.findMethod(DateTimeTools.class, "getCurrentDateTime");
 ToolCallback toolCallback = MethodToolCallback.builder()
-    .toolDefinition(ToolDefinitions.builder(method)
+    .toolDefinition(ToolDefinitions.builder()
             .description("Get the current date and time in the user's timezone")
             .build())
     .toolMethod(method)