remove aulas collection in favor of using plugin

_layouts/cursos.html

@@ -15,7 +15,7 @@
     </title>
 
 
-    {% assign aulas = site.aulas | sort: 'date' | reverse %}
+    {% assign aulas = site.data.aulas | sort: 'date' | reverse %}
  
 	<script>
 		const switchGrind = () =>{
@@ -66,7 +66,7 @@
 						</div>
 
                         <div id="grad" class=" is-flex is-justify-content-center is-align-content-center">
-							{% assign aulas = site.aulas | sort: 'date' | reverse %}
+							{% assign aulas = site.data.aulas | sort: 'date' | reverse %}
 							<div class="columns is-multiline">
 								{% for aula in aulas %}
 								{% assign nome = aula.name | replace: ".md","" %}
@@ -125,4 +125,4 @@
 			<!-- Conteúdo do rodapé -->
 		</footer>
 	</body>
-</html>
+</html>