[Bug]: Replica assignment doesn't work

[sehz]

What happened
replica assignment fails

Expected behavior
topic with replica assignment should work

Describe the setup

Release Channel      : stable
Fluvio CLI           : 0.10.13
Fluvio CLI SHA256    : c83592af48c629a17c1210c1bf222865d897aeb7ed28e1350e6a3121f07efb13
Fluvio channel frontend SHA256 : 34c0fec193c5b5e429f19eb96d3f3ac2f511ca8bc55bb1c263e3d2527476a14

How to reproduce it (as minimally and precisely as possible)

Using configuration from https://www.fluvio.io/docs/architecture/replica-assignment/

{ 
    "partitions": [{
            "id": 0,
            "replicas": [5001, 5002,] 
        }
    ]
}

$ fluvio cluster start --local --spu 2
$ fluvio topic create test2 -f b.json
cannot parse replica assignment file "b.json": missing field `maps` at line 11 column 1

Log output

Environment (please complete the following information):

• OS: [Mac]

Additional context