bin/gen_release_notes.py: html escape all external data

All of these (bug titles, patch titles, features, and people's names)
can contain characters that are not valid html. Just escape everything
for safety.

Fixes: 86079447da1e00d49db0cbff9a102eb4e71e8702
       ("scripts: Add a gen_release_notes.py script")
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
1 file changed