"Links" section: every link in new line

- [ ] bug report
- [x] feature request
- [ ] support request

#### Actual behavior:
All links are arranged one after another


#### Expected behavior:
Each link is located on a new line

#### What is the motivation for changing the behavior?
Convenience of reading the bug list

#### Please tell us about your environment:

| component | version |
| --- | --- |
| Allure version | 2.4.0 |
| Test framework | pytest|
| Allure adaptor | allure-pytest@2.3.2b1|
| Generate report using | custom script |

Reproduce the report with Allure 2.4.0, pytest, and the reported custom generation script, then inspect the rendered "Links" section shown in the issue image. Locate the report entry point responsible for that section and verify that each link renders on its own line; the issue provides no file or test path to start from.

Written by the indexing model from the issue text.