DeviceDetector->isMobile() should not rely on ClientHints when isBot() is true

[juongithub]

Since a bot could pretend to be a mobile device using HTTP headers, isMobile() should not return true if isBot() is true.
I propose the following change in DeviceDetector.php:

From:

    public function isMobile(): bool
    {
        // Client hints indicate a mobile device
        if ($this->clientHints instanceof ClientHints && $this->clientHints->isMobile()) {
            return true;
        }
        ...

        return !$this->isBot() && !$this->isDesktop();
    }

To:

    public function isMobile(): bool
    {
        if ($this->isBot()) {
    	    return false;
        }

        // Client hints indicate a mobile device
        if ($this->clientHints instanceof ClientHints && $this->clientHints->isMobile()) {
            return true;
        }
        ...

        return  !$this->isDesktop();
    }