[Docs]: Fix wrong code on README.md documentation

[viniciusteixeiradias]

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Syntax error on README.md

The problem

https://github.com/winstonjs/winston#common-transport-options

Should be:

transports: [
    new winston.transports.File({
      filename: 'error.log',
      level: 'error',
      format: winston.format.json()
    }),
    new winston.transports.Http({ // add winston. before transports
      level: 'warn',
      format: winston.format.json()
    }),
    new winston.transports.Console({ // add winston. before transports
      level: 'info',
      format: winston.format.combine(
        winston.format.colorize(),
        winston.format.simple()
      )
    })
  ]

What version of Winston presents the issue?

v3.9.0

What version of Node are you using?

v16.8.0

If this worked in a previous version of Winston, which was it?

No response

Minimum Working Example

No response

Additional information

No response

[DABH]

Closed via above referenced PR