Merge pull request 'footer.html: update date info' (#26) from yutyo/oyd-web:footer-date into master

Reviewed-on: oyd/oyd-web#26

layouts/partials/footer.html

@@ -1,7 +1,7 @@
 <footer>
   <div class="container">
     <div class="copyright">
-    &copy; 2019-2020 Özgür Yazılım Derneği. | <a href="https://git.oyd.org.tr/oyd/oyd-web" target="_blank" style="color: white;">{{ i18n "kaynak" }}</a>
+    &copy; 2019-2021 Özgür Yazılım Derneği. | <a href="https://git.oyd.org.tr/oyd/oyd-web" target="_blank" style="color: white;">{{ i18n "kaynak" }}</a>
     </div>
     <table class="license" cellspacing="1" cellpadding="0">
       <tr>