Error mail: Convert time to current timezone

Closes #111.

owl/error_mail.py

@@ -65,7 +65,7 @@ def send_email(app: Flask, send_to: str, full_name: str, subject: str, body: str
         )
     ]
     msg['Subject'] = subject
-    msg['Date'] = datetime.datetime.now()
+    msg['Date'] = datetime.datetime.now().astimezone()
 
     msg.set_content(body, cte='quoted-printable')