[BUG]: Phalcon\Html\Helper\Title invoke - remove separator

[niden]

The Title helper has the following __invoke parameters

    public function __invoke(
        string $separator = '',
        string $indent = '',
        string $delimiter = PHP_EOL
    ): Title

This works fine when one sets the title from the controller like so:

        $this
            ->tag
            ->title(' : ')
            ->set('AWESOME APP')
            ->append('Home')

which should produce a

<title>AWESOME APP : Home</title

However in the view, the call

    {{ tag.title() }}

produces

<title>AWESOME APPHome</title

because the separator is overwritten. To achieve the desired behavior the volt code has to be changed to

    {{ tag.title(' : ') }}

which forces developers to use the separator in two spots.

The signature of __invoke has to change, and the separator has to be removed

[niden]

Resolved in #15867