fixup! logging: update MozLogFormatter to output MozLog

Author: shtrom

src/lando/main/logging.py

@@ -78,7 +78,7 @@ def format(self, record: logging.LogRecord) -> str:
             "source": record.name,
             # log action
             "level": self.PRIORITY.get(record.levelname, self.SL_WARNING),
-            "message": record.msg,
+            "message": str(record.msg),
             # Old format
             "EnvVersion": self.MOZLOG_ENVVERSION,
             "Hostname": self.hostname,