Test docstrings are not rendered in the report in a consistent way

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#### I'm submitting a ...
- [x] bug report
- [ ] feature request
- [ ] support request => Please do not submit support request here, see note at the top of this template.

#### What is the current behavior?

Execute this pytest code
```
def test_1():
""" First description """
pass

def test_2():
"""
Second description
"""
pass

```
In the Allure report, the descriptions are included as follows:
```

```

        Second description

    

` tag.
Multi-line docstrings are included with the `

` tags.


#### If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem

Execute the pytest code provided above

#### What is the expected behavior?

Docstrings should be included in the report in a consistent way.

#### What is the motivation / use case for changing the behavior?

It is desirable to have a consistent behavior

#### Please tell us about your environment:

- Allure version:        2.24.1

- Test framework:        pytest@4.1.1

- Allure adaptor:        allure-pytest@2.13.2

#### Other information 

[//]: # (

. e.g. detailed explanation, stacktraces, related issues, suggestions 

. how to fix, links for us to have more context, eg. Stackoverflow, Gitter etc

)

![Screenshot from 2023-11-09 22-24-51](https://github.com/allure-framework/allure-python/assets/16239820/06aa72bb-6c27-44f5-8177-79cdb5badf3b)

![Screenshot from 2023-11-09 22-26-25](https://github.com/allure-framework/allure-python/assets/16239820/6a1647ee-8401-41c5-9235-f117b34e2f09)

まず、2つのpytestテストで問題を再現し、それぞれのdocstringがAllureレポートにどのように表示されるかを比較します。このissueでは、この例以外の実装ファイルやテストは指定されていないため、allure-pytestがdocstringをどのようにレポートに渡しているかを追跡してください。1行のdocstringと複数行のdocstringが一貫してレンダリングされれば完了です。issueでは、どのレンダリング形式が期待されるかは指定されていません。

索引モデルが issue の本文から書いたものです。