Update development documentation about code style

docs/en/development/continuous-integration.md

@@ -71,6 +71,8 @@ This check means that the CI system started to process the pull request. When it
 Performs some simple regex-based checks of code style, using the [`utils/check-style/check-style`](https://github.com/ClickHouse/ClickHouse/blob/master/utils/check-style/check-style) binary (note that it can be run locally).
 If it fails, fix the style errors following the [code style guide](style.md).
 
+Python code is checked with [black](https://github.com/psf/black/).
+
 ### Report Details
 - [Status page example](https://clickhouse-test-reports.s3.yandex.net/12550/659c78c7abb56141723af6a81bfae39335aa8cb2/style_check.html)
 - `output.txt` contains the check resulting errors (invalid tabulation etc), blank page means no errors. [Successful result example](https://clickhouse-test-reports.s3.yandex.net/12550/659c78c7abb56141723af6a81bfae39335aa8cb2/style_check/output.txt).

docs/zh/development/continuous-integration.md

@@ -42,6 +42,8 @@ git push
 使用`utils/check-style/check-style`二进制文件执行一些简单的基于正则表达式的代码样式检查(注意, 它可以在本地运行).
 如果失败, 按照[代码样式指南](./style.md)修复样式错误.
 
+使用 [black](https://github.com/psf/black/) 檢查 python 代碼.
+
 ### 报告详情 {#report-details}
 -  [状态页示例](https://clickhouse-test-reports.s3.yandex.net/12550/659c78c7abb56141723af6a81bfae39335aa8cb2/style_check.html)
 -  `docs_output.txt`记录了查结果错误(无效表格等), 空白页表示没有错误. [成功结果案例](https://clickhouse-test-reports.s3.yandex.net/12550/659c78c7abb56141723af6a81bfae39335aa8cb2/style_check/output.txt)