Merge branch '18047-event-item-links-dont-look-like-links' into 'master'

Updated '.event-item a' color

## What does this MR do?

Changes the color of `.event-item` links.

## Are there points in the code the reviewer needs to double check?

Did you want this restricted only to the activity page or anywhere showing `.event-item`'s?

## Why was this MR needed?

UX

## What are the relevant issue numbers?

Closes #18047.

## Screenshots (if relevant)

![Screen_Shot_2016-06-08_at_20.07.54](/uploads/9670fbeb6fac7a334a83e11ffc05148c/Screen_Shot_2016-06-08_at_20.07.54.png)

See merge request !4544

app/assets/stylesheets/pages/events.scss

@@ -21,7 +21,7 @@
   }
 
   a {
-    color: $gl-dark-link-color;
+    color: $gl-link-color;
   }
 
   .avatar {