update readme

Author: 2881099

Extensions/FreeSql.Extensions.BaseEntity/README.MD

@@ -31,6 +31,10 @@ This article will introduce a very simple CRUD operation method of BaseEntity.
 
 > dotnet add package FreeSql.Provider.Sqlite
 
+```csharp
+BaseEntity.Initialization(fsql, null);
+```
+
 1. Define an auto-increment primary key of type `int`. When the `TKey` of `BaseEntity` is specified as `int/long`, the primary key will be considered as auto-increment;
 
 ```csharp

Extensions/FreeSql.Extensions.BaseEntity/README.zh-CN.MD

@@ -30,6 +30,10 @@ BaseEntity 是一种极简单的 CodeFirst 开发方式，特别对单表或多
 
 > dotnet add package FreeSql.Provider.Sqlite
 
+```csharp
+BaseEntity.Initialization(fsql, null);
+```
+
 1、定义一个主键 int 并且自增的实体类型，BaseEntity TKey 指定为 int/long 时，会认为主键是自增；
 
 ```csharp