Apostrophy & other non-text characters in instance public name improperly rendered in header
Steps to reproduce
Set the public instance name that includes non-text characters like " or &
What happens?
On the instance landing and about pages, these characters are rendered as their html codes (e.g. ".
What is expected?
Display characters as you see them in the instance settings.
Context
Funkwhale version(s) affected: 0.20.0+git.34ffab27
