[Server Bug]: markdown links are removed

Description

There is already a bug ticket for writing markdown in Pixelfed, but this is for the opposite: If someone writes a post in any platform which can do markdown, and writes a link in markdown, it should be shown Pixelfed too.

This came out of a fedibridge ticket

How it was written in Holos:

And how it looks in Pixelfed

So no markdown link are transferred. Link: https://holos.joergi.eu/users/joergi/statuses/1789193940255-qj1nt4

Steps to reproduce

1. Write in holos or somewhere else a post with a markdown link
2. See that it's not working in Pixelfed

Pixelfed version

0.14.1

Acknowledgements

Yes