fix: 修正 toString 方法。

mybatis-flex-core/src/main/java/com/mybatisflex/core/query/RawQueryColumn.java

@@ -18,6 +18,7 @@ package com.mybatisflex.core.query;
 
 import com.mybatisflex.core.dialect.IDialect;
 
+import java.util.Arrays;
 import java.util.List;
 
 /**
@@ -48,6 +49,7 @@ public class RawQueryColumn extends QueryColumn implements HasParamsColumn {
     public String toString() {
         return "RawQueryColumn{" +
             "content='" + content + '\'' +
+            ", params='" + Arrays.toString(params) + '\'' +
             '}';
     }