console: codegen fails for actions with scalar output

### Version Information

Server Version: v2.6.0

### Environment

All

### What is the expected behaviour?

Action codegen should work for actions returning scalars

### Keywords

### What is the current behaviour?

The console throws an error while generating code

### How to reproduce the issue?

1. Add the following action

```graphql
type Query {
action_name(
actionInput: [String!]
): String!
}
```

2. Head to the codegen tab

### Screenshots or Screencast