Fix typo for QC log file writing

Author: martenole

DATA/production/qc-sync/qc-global-epn.json

@@ -26,7 +26,7 @@
         "filterDiscardLevel": "1",
         "filterDiscardFile": "../../qc-_ID_.log",
         "filterRotateMaxBytes": "100000000",
-        "filterRotateMaxFiles": "2",
+        "filterRotateMaxFiles": "2"
       }
     }
   }