foia_send_email task runs into Unicode Encoding Errors

[duckduckgrayduck]

This is our most common error on Sentry
https://muckrock.sentry.io/issues/6864839790/?project=996&query=is%3Aunresolved&referrer=issue-stream&sort=freq

A link to the start of the method:

muckrock/muckrock/foia/tasks.py

Line 1060 in 2a6acaf

def foia_send_email(foia_pk, comm_pk, options, **kwargs):

Error message: UnicodeEncodeError
'utf-8' codec can't encode characters in position 127-129: surrogates not allowed

Inside of foia_send_email we call send_delayed_email

muckrock/muckrock/foia/models/request.py

Line 888 in 2a6acaf

def send_delayed_email(self, comm, **kwargs):

In this function we probably need to sanitize the email subject and body before sending so that it doesn't fail

[duckduckgrayduck]

Similar sentry error, albeit from mailgun
https://muckrock.sentry.io/issues/6988292417/?project=996&query=is%3Aunresolved&referrer=issue-stream&sort=freq