Fix bug running local node

Unable to run local node:

After cloning the repo, and run the following code: `fuel-core run --snapshot ./your/path/to/chain_config_folder --db-type in-memory --debug:
```
Error: an error occurred while loading the chain state file: Some("./local/chain_config.json")

Caused by:
unknown variant `V2`, expected `V1` at line 4 column 8
```

To fix this issue, use update that line to `V1`.