📖 🔧：begin making collections page corrections

This is a placeholder for thoughts to come once another PR is merged.

collections/index.html

@@ -34,6 +34,8 @@
 
 <h2>All Collections</h2>
 
+<p>Collections are curated stories showcasing the best of our engineers, experiments, tools, and resources.</p>
+
 <ul>
 {% for collection in site.collections %}
   <li>{{ collection.label }}</li>