hores: update dates and add link to external repo

I've open sourced the project recently while also working on it, so this
CL updates the project card.

Change-Id: Ie07f7c69dbf29de42f4d2c6ef27353d96543ae9c
diff --git a/index.html b/index.html
index 5aa8c6a..15a949a 100644
--- a/index.html
+++ b/index.html
@@ -83,17 +83,17 @@
               <div class="mdc-card__media mdc-card__media--16-9" style="background-image: url('img/hores.png');"></div>
               <div class="project-card__primary">
                 <h3 class="project-card__title mdc-typography mdc-typography--headline6"><i>Hores</i></h3>
-                <h4 class="project-card__subtitle mdc-typography mdc-typography--subtitle2">Jul 2019 - Dec 2019</h4>
+                <h4 class="project-card__subtitle mdc-typography mdc-typography--subtitle2">Jul 2019 - Currently</h4>
               </div>
               <div class="project-card__secondary mdc-typography mdc-typography--body2">Project I've profesionally developed for my previous high school so they can keep track of their workers' working hours, in order to comply with the new workers legislation in Spain.</div>
               <div class="mdc-card__actions">
                 <div class="mdc-card__action-buttons">
+                  <a href="https://gerrit.avm99963.com/plugins/gitiles/hores-external" target="_blank" rel="noreferrer" class="mdc-button mdc-card__action mdc-card__action--button" data-mdc-auto-init="MDCRipple">
+                    <span class="mdc-button__ripple"></span> Gerrit repo
+                  </a>
                   <a href="https://hores.sandbox.avm99963.com/" target="_blank" rel="noreferrer" class="mdc-button mdc-card__action mdc-card__action--button" data-mdc-auto-init="MDCRipple">
                     <span class="mdc-button__ripple"></span> Demo
                   </a>
-                  <button disabled class="mdc-button mdc-card__action mdc-card__action--button" data-mdc-auto-init="MDCRipple">
-                    <span class="mdc-button__ripple"></span> Closed source
-                  </button>
                 </div>
               </div>
             </div>