Additional & in Arabic “Fork & Edit on GitHub” translation

[yatil]

Needs to be fixed here:

https://github.com/w3c/wai-website-data/blob/master/translations.yml#L169

- en: 'Fork & Edit on GitHub'
  ar: 'تفرع & وتحرير على GitHub'

(I don’t know Arabic, maybe just removing the & in the translation is sufficient.)

[shawna-slh]

I'm on it...

[shawna-slh]

fixed