update sql modules url (#78)

Author: tanruixiang

docs/src/cn/design/architecture.md

@@ -66,7 +66,7 @@ CeresDB 是一个时序数据库，与经典时序数据库相比，CeresDB 的
 
 ### SQL 层
 
-模块路径：https://github.com/CeresDB/ceresdb/tree/main/sql
+模块路径：https://github.com/CeresDB/ceresdb/tree/main/query_frontend
 
 SQL 层负责解析 SQL 并生成查询计划。
 

docs/src/en/design/architecture.md

@@ -66,7 +66,7 @@ Basically, HTTP and MySQL are used to debug CeresDB, query manually and perform
 
 ### SQL Layer
 
-module path: https://github.com/CeresDB/ceresdb/tree/main/sql
+module path: https://github.com/CeresDB/ceresdb/tree/main/query_frontend
 
 SQL layer takes responsibilities for parsing sql and generating the query plan.