Author attribution problems

[glenn-jocher]

Author attributions are not always obtained correctly from git, and possibly neither also from the GitHub REST API fallback using email addresses (possibly because the user does not present a public email address on their profile).

Reproduce

git clone https://github.com/ultralytics/ultralytics
cd ultralytics
pip install -e ".[dev]"
mkdocs serve -f docs/mkdocs.yml

Output:

...
INFO    -  Building documentation...
INFO    -  Cleaning site directory
INFO    -  Converting notebook (execute=False): /Users/glennjocher/PycharmProjects/ultralytics/docs/en/datasets/explorer/explorer.ipynb
Running GitHub REST API for author ayush.chaurarsia@gmail.com
Running GitHub REST API for author glenn.jocher@ultralytics.com
WARNING (mkdocs_ultralytics_plugin): No username found for glenn.jocher@ultralytics.com
Running GitHub REST API for author chr043416@gmail.com
WARNING (mkdocs_ultralytics_plugin): No username found for chr043416@gmail.com
Running GitHub REST API for author xinwang614@gmail.com
Running GitHub REST API for author muhammadrizwanmunawar123@gmail.com
Running GitHub REST API for author 1579093407@qq.com
WARNING (mkdocs_ultralytics_plugin): No username found for 1579093407@qq.com
Running GitHub REST API for author abirami.vina@gmail.com
Running GitHub REST API for author shuizhuyuanluo@126.com
WARNING (mkdocs_ultralytics_plugin): No username found for shuizhuyuanluo@126.com
INFO    -  Documentation built in 72.59 seconds
INFO    -  [14:57:52] Watching paths for changes: 'docs/en', 'docs/mkdocs.yml'
INFO    -  [14:57:52] Serving on http://127.0.0.1:8000/