update CC lecense date

Author: obensource

src/index.html

@@ -153,7 +153,7 @@ <h5 class="white-text"><a href="https://github.com/PDXNode/pdxnode/blob/master/c
         </div>
         <div class="footer-copyright">
           <div class="container">
-            <strong>(<a class="grey-text text-lighten-3" href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>)</strong> 2017 PDXNode & Contributors 🎉
+            <strong>(<a class="grey-text text-lighten-3" href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>)</strong> 2018 PDXNode & Contributors 🎉
             <a class="grey-text text-lighten-4 right" href="https://github.com/pdxnode/pdxnode.org">⚙️ Edit on Github</a>
           </div>
         </div>