Spaces in Font's name are not escaped

Cloudinary supports all of Google's fonts https://support.cloudinary.com/hc/en-us/articles/203352832-What-is-the-list-of-supported-fonts-for-text-overlay-transformation- and some of them have spaces on them, for example, "Open Sans"

But unlike Text Transformation where spaces are escaped https://github.com/cloudinary/cloudinary_gem/blob/28a9ee65d24c6bac0654919a5a76de95cf356510/lib/cloudinary/utils.rb#L399 font family aren't https://github.com/cloudinary/cloudinary_gem/blob/28a9ee65d24c6bac0654919a5a76de95cf356510/lib/cloudinary/utils.rb#L452

resulting in an invalid URL

```ruby
[1] pry(main)> Cloudinary::VERSION
=> "1.20.0"
[2] pry(main)> url = Cloudinary::Utils.cloudinary_url("coffee_cup.jpg", transformation: [
{overlay: {font_family: "Open Sans", text: "Text with spaces", font_size: 10}}
])
=> "http://res.cloudinary.com/cookpad/image/upload/l_text:Open Sans_10:Text%20with%20spaces/coffee_cup.jpg"
[3] pry(main)> URI.parse url
URI::InvalidURIError: bad URI(is not URI?): "http://res.cloudinary.com/cookpad/image/upload/l_text:Open Sans_10:Text%20with%20spaces/coffee_cup.jpg"
```

Commencez dans lib/cloudinary/utils.rb, en comparant l’échappement de la transformation de texte autour de la ligne 399 avec la gestion de font-family autour de la ligne 452. Reproduisez l’exemple Open Sans de l’issue et vérifiez que l’URL Cloudinary générée échappe les espaces du nom de la police et peut être analysée comme une URI valide.

Rédigé par le modèle d'indexation à partir du texte de l'issue.