bug: Podcast pic altered by long description

Describe the bug

Title pretty clear, no ? :)

Steps to reproduce

1. Write a long description for a podcast
2. Go on the index page, see profile pic not keeping its squared shaped

Expected behavior

Podcast pic dimension should not be altered because of a long description

Actual behavior

See for yourself :

Context

• Castopod: https://github.com/YunoHost-Apps/castopod_ynh/
• OS: Debian 10 server / mac OS client
• Browser: FF 86