Update subscribe button in top nav

components/site-nav/index.js

@@ -13,7 +13,7 @@ const SiteNav = () => (
         <Link href="/roadmaps"><a>Roadmaps</a></Link>
         <Link href="/guides"><a>Guides</a></Link>
         <Link href="/about"><a>FAQ</a></Link>
-        <Link href="/signup"><a className="signup">Sign Up</a></Link>
+        <Link href="/signup"><a className="signup">Subscribe</a></Link>
       </div>
     </div>
   </HeaderWrap>