fix: fix typo

Signed-off-by: Jongmin Kim <whdalsrnt@megazone.com>

Author: Jongmin Kim

config/default.json

@@ -29,7 +29,7 @@
     "board": "grpc://board:50051/v1",
     "file_manager": "grpc://file-manager:50051/v1",
     "dashboard": "grpc://dashboard:50051/v1",
-    "opsflow": "grpc://opsflow:50051/v1",
+    "opsflow": "grpc://opsflow:50051/v1"
   },
   "baseURL": "http://localhost:3000",
   "baseURLV2": "",