Change collections list meta description

[sylvieed]

Right now, this is the meta_description for the collections list page (that shows up on Google searches):

You're free to choose from the many interesting projects hosted on FromThePage. Start reading the historical writings that have been already transcribed by other members. You're welcome to help one of the great projects come into the digital age.

https://github.com/benwbrum/fromthepage/blob/8a13770e29fe743346d988364a1f55ab7dd3f60c/config/locales/dashboard/dashboard-en.yml#L9