Readme example code fails to create index for an "invalid index params" error

[ildella]

Describe the bug:
Following the README code, the await client.createIndex({... fails with an invalid index params error.

Steps to reproduce:

1. follow the whole README
2. run the code

the createIndex returns this:

      {
        error_code: 'UnexpectedError',
        reason: 'invalid index params: map[dim:128 index_type:HNSW metric_type:L2]',
        code: 0
      }

And then the following command, client.loadCollectionSync({collection_name}) fails with:

    ErrorCode: UnexpectedError. Reason: index doesn't exist, collectionID 441604979289427265

Milvus-node-sdk version:
2.2.10

Milvus version:
v2.2.8

[nameczz]

@ildella Hi, we got some error on our readme.

param: { efConstruction: 5, M: 4 } should be params: { efConstruction: 10, M: 4 }.
Because of efConstruction rang [8,512].

We will fix it soon. Thanks

[ildella]

it worked ;)