Update action link colors to use theme variables

packages/rocketchat-action-links/client/stylesheets/actionLinks.less

@@ -7,14 +7,14 @@
 			cursor: pointer;
 			position: relative;
 			padding-right: 2px;
-			color: #036;
+			color: @primary-background-color;
 
 			list-style: none;
 			display: inline;
 
 
 			&:hover {
-				color: #369;
+				color: @link-font-color;
 			}
 		}