docs: update API ref documents

Signed-off-by: peefy <xpf6677@163.com>

Author: Peefy

docs/reference/xlang-api/overview.md

@@ -4,7 +4,7 @@ sidebar_position: 1
 
 # Introduction
 
-The KCL language provides general programming language APIs.
+The KCL language provides multiple general-purpose programming language interfaces, with identical API forms and features.
 
 ## C/Rust APIs