banner(typo): fix capitalization in the banner

Author: naomiblack

public/_includes/_hero-home.jade

@@ -9,5 +9,5 @@ header(class="background-sky l-relative")
     announcement-bar
       .announcement-bar-slide.clearfix
         img(src="/resources/images/logos/anglebrackets/anglebrackets.png")
-        p Join us for <strong>anglebrackets in Las Vegas</strong> Oct 25-28!
+        p Join us for <strong>Anglebrackets in Las Vegas</strong> Oct 25-28!
         a(href="https://anglebrackets.org/#!/" target="_blank" class="button md-button") Register now