🩹 Fix: default logger color behaviour

[ghost]

Description

#2493 introduces DisableColors, but it's default value is set to true, which contradicts the documentation:

https://docs.gofiber.io/api/middleware/logger#config

// DisableColors defines if the logs output should be colorized
//
// Default: false
DisableColors bool

https://docs.gofiber.io/api/middleware/logger#default-config, as well as https://github.com/gofiber/fiber/blob/master/middleware/logger/config.go#L94

var ConfigDefault = Config{
	Next:         nil,
	Done:         nil,
	Format:       "[${time}] ${status} - ${latency} ${method} ${path}\n",
	TimeFormat:   "15:04:05",
	TimeZone:     "Local",
	TimeInterval: 500 * time.Millisecond,
	Output:       os.Stdout,
    	DisableColors: true,
}

and therefore, coloring is disabled by default, and can only be enabled by explicitly setting DisableColors to false

app.Use(logger.New(logger.Config{DisableColors: false}))

Type of change

• Bug fix (non-breaking change which fixes an issue)
• This change requires a documentation update

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation - /docs/ directory for https://docs.gofiber.io/
• New and existing unit tests pass locally with my changes

Commit formatting:

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[ReneWerner87]

@cmd777 can you look at the tests

[ghost]

@ReneWerner87 okay, the logger tests were fixed

just another test file failed with Test_Ctx_SendFile_RestoreOriginalURL