style: remove extra blank line in settings.py

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: kushalbakshi

src/datajoint/settings.py

@@ -224,7 +224,6 @@ def set_default_port_from_backend(self) -> "DatabaseSettings":
         return self
 
 
-
 class ConnectionSettings(BaseSettings):
     """Connection behavior settings."""