Fixed typo in event name

Fixed typo in event name, changed "catelog" to "catalog"

Author: dverkade

app/code/Magento/CatalogSearch/Model/Indexer/Fulltext/Action/DataProvider.php

@@ -205,7 +205,7 @@ public function getSearchableAttributes($backendType = null)
             $attributes = $productAttributes->getItems();
 
             $this->eventManager->dispatch(
-                'catelogsearch_searchable_attributes_load_after',
+                'catalogsearch_searchable_attributes_load_after',
                 ['engine' => $this->engine, 'attributes' => $attributes]
             );