docs: Update tools.adoc (spring-projects#4278)

correct typo from 'tools' to 'toolNames' in tools.adoc

Fixes: spring-projects#4278
Auto-cherry-pick to 1.0.x

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

Author: Yornii

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

@@ -618,7 +618,7 @@ class WeatherTools {
 
 ==== Adding Tools to `ChatClient`
 
-When using the dynamic specification approach, you can pass the tool name (i.e. the function bean name) to the `tools()` method of `ChatClient`.
+When using the dynamic specification approach, you can pass the tool name (i.e. the function bean name) to the `toolNames()` method of `ChatClient`.
 The tool will only be available for the specific chat request it's added to.
 
 [source,java]