[fix] characters encoding in plain text email

canapEPFL/helpers.php

@@ -11,6 +11,7 @@ function mailToResp($surname, $name, $job){
       "Consulter la candidature sur: https://canap-gest.epfl.ch/";
 
   $headers = "From: $EMAIL_FROM\r\n" .
+      "Content-type: text/plain; charset=utf8\r\n" .
       "Reply-To: $EMAIL_REPLY_TO\r\n" .
       "X-Mailer: PHP/" . phpversion();