Fix tool email address

Update the sender address in `.env`.

Bug: T417806

Author: samwilson

.env

@@ -24,7 +24,7 @@ MAILER_DSN=smtp://mail.tools.wmflabs.org:25
 
 APP_GOOGLE_KEYFILE=
 
-APP_MAIL_SENDER=tools.wikimedia-ocr@tools.wmflabs.org
+APP_MAIL_SENDER=tools.ocr@tools.wmflabs.org
 APP_LOG_RECIPIENT_1=admin1@example.org
 APP_LOG_RECIPIENT_2=admin2@example.org
 APP_LOG_SUBJECT="[Wikimedia OCR]"