fix(search):修复搜索功能中的SQL语法错误

- 移除了多余的where关键字避免SQL语法错误，<where>动态条件标签中不需要手动添加where关键字

Signed-off-by: LiggMax <wenzhouli06@gmail.com>

Author: LiggMax

common/src/main/resources/mapper/SearchMapper.xml

@@ -16,7 +16,7 @@
         left join product_detail pd on p.id = pd.product_id
         <where>
             <if test="keyword != null and keyword != ''">
-                where p.title like concat('%', #{keyword}, '%')
+                p.title like concat('%', #{keyword}, '%')
                 or pd.description like concat('%', #{keyword}, '%')
             </if>
         </where>