apache / apache/doris-website

Issue on docs string-functions/to-base64

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Description

- Page Link: https://doris.apache.org/zh-CN/docs/sql-manual/sql-functions/scalar-functions/string-functions/to-base64

- Version: 2.1

- Reason: 如图所示,描述有歧义。
BASE64 是一种用 64 个可打印字符 表示二进制数据的编码方式,常用于在文本协议(如 HTTP、Email)中安全传输二进制数据(如图片、文件等)。
BASE64 的核心特点
可打印字符:仅使用 A-Z、a-z、0-9、+、/ 和 =(填充符),确保兼容文本系统。
编码后数据变大:每 3 字节 二进制数据 → 4 字节 BASE64 字符(体积增加约 33%)。

- May I contribute to this pull request? Our company has been frequently using Doris lately. If given the chance, I would also like to gradually become involved in the community.(如果确认该Issue的话,可以由我来提交PR吗,我很希望参与到doris社区当中)

- ScreenShot:
![Image](https://github.com/user-attachments/assets/93c13551-15ce-4930-a854-cf48c57b446e)
![Image](https://github.com/user-attachments/assets/8e18f4ca-116c-4972-a3e9-44cbdf1d9be3)

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