Change tag from fontawesome to font awesome

To match the majority on the new tagcloud on http://themes.gohugo.io/.

theme.toml

@@ -3,7 +3,7 @@ license = "MIT"
 licenselink = "https://github.com/shenoybr/hugo-goa/blob/master/LICENSE.md"
 description = "Simple Minimalist Hugo Theme"
 homepage = "https://github.com/shenoybr/hugo-goa"
-tags = ["Roboto", "Lato", "Roboto Slab", "bootstrap", "fontawesome", "minimal", "clean"]
+tags = ["Roboto", "Lato", "Roboto Slab", "bootstrap", "font awesome", "minimal", "clean"]
 features = ["blog", "pages", "minimal", "responsive", "404", "icons", "disqus", "anlaytics"]
 min_version = 0.16