This worked for me:
Change the url:
SSH into the guest machine:
$ trellis ssh development
In the guest machine:
List of all repositories (just to check)
$ grep ^ /etc/apt/sources.list /etc/apt/sources.list.d/*
Go to directory:
$ cd /etc/apt/sources.list.d
Delete the file:
$ sudo rm nyc2_mirrors_digitalocean_com_mariadb_repo_10_5_ubuntu.list
From host machine (trellis folder):
$ vagrant provision