Un-mute the description text for accessibility (#1340)

-   Ticket: [ENG-3235](https://openscience.atlassian.net/browse/ENG-3235)
-   Feature flag: n/a

## Purpose

The description text on the collections discover page was not passing accessibility standards of contrast. This fixes that.

## Summary of Changes

1. Un-mute the text

## Side Effects

None

## QA Notes

Just needs to run through accessibility testing.

Author: brianjgeiger

lib/collections/addon/components/collection-search-result/node/template.hbs

@@ -23,7 +23,7 @@
         <p>
             <div
                 data-test-collection-search-result-node-description
-                class='text-muted m-t-sm'>
+                class='m-t-sm'>
                 {{#if this.showBody}}
                     {{unescape-xml-entities this.item.description}}
                 {{else}}