Click on the chain link above the text comment box. (It has a B, I, “, and the chain link).

Pastr your link in the box that pops up, and then in the brackets that say [Enter Text], erase that text and write whatever you want. It doesn’t have character limits, but you do have to leave the [Brackets]

Edit: corrected horrible mispellings

Second edit: you can probably type out that same format yourself.

enter text

Third edit: you can, but it doesn’t show your link in Blue, just white text, but the link is still there.