fix: add SMTP_AUTH and SMTP_ALLOWED_TLS_VERSIONS

Added SMTP_AUTH: login and SMTP_ALLOWED_TLS_VERSIONS to help
with SSL handshake on port 465.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

asciinema/compose.yaml

@@ -19,8 +19,10 @@ services:
       SMTP_USERNAME: ${EMAIL_SMTP_USER}
       SMTP_PASSWORD: ${EMAIL_SMTP_PASSWORD}
       SMTP_SSL: true
-      SMTP_RETRIES: 2
+      SMTP_AUTH: login
+      SMTP_RETRIES: 1
       SMTP_NO_MX_LOOKUPS: true
+      SMTP_ALLOWED_TLS_VERSIONS: tlsv1.2,tlsv1.3
       MAIL_FROM_ADDRESS: ${EMAIL_FROM}
       MAIL_REPLY_TO_ADDRESS: ${ASCIINEMA_MAIL_REPLY_TO}
       SIGN_UP_DISABLED: ${ASCIINEMA_SIGN_UP_DISABLED:-false}