style: remove trailing whitespace from .env.example

- Deleted the unnecessary blank line in the .env.example file
- This change improves file readability and maintains code cleanliness

Author: fulleni

.env.example

@@ -44,7 +44,6 @@
 # This provides a secure way to set or recover the admin account.
 # OVERRIDE_ADMIN_EMAIL="[email protected]"
 
-
 # OPTIONAL: Limit for the /auth/request-code endpoint (requests per window).
 # RATE_LIMIT_REQUEST_CODE_LIMIT=3