[logging] Add .log suffix for log files

pyhmy/logging.py

@@ -17,7 +17,7 @@ class ControlledLogger:
         if log_dir.endswith('/'):
             log_dir = log_dir[:-1]
         os.makedirs(log_dir, exist_ok=True)
-        handler = logging.FileHandler(f"{log_dir}/{logger_name}")
+        handler = logging.FileHandler(f"{log_dir}/{logger_name}.log")
         handler.setFormatter(logging.Formatter('%(levelname)s - %(message)s'))
 
         self.logger = logging.getLogger(logger_name)