override letter-spacing styling for arabic nav button

[MustafaHaddara]

Adding the styles inline feels a little messy to me; I'm open to alternative approaches.

Another option is to remove line 34 in static/jekyll-site.sass

  .navRight a {
    color:grey;
    text-transform: uppercase;
    text-decoration: none;
    letter-spacing: 0.15em; // <-- delete this line
    padding: 15px 20px;
    position: relative;
  }

but that changes the styling for the entire site.

Closes #434