docs: Fix typo (#455)

docs/05_content_nodes.md

@@ -160,7 +160,7 @@ YAML.stringify(obj)
 
 `Alias` nodes provide a way to include a single node in multiple places in a document; the `source` of an alias node must be a preceding anchor in the document.
 Circular references are fully supported, and where possible the JS representation of alias nodes will be the actual source object.
-For ease of use, alias nodes also provide a `resolve(doc)` method to dreference its source node.
+For ease of use, alias nodes also provide a `resolve(doc)` method to dereference its source node.
 
 When nodes are constructed from JS structures (e.g. during `YAML.stringify()`), multiple references to the same object will result in including an autogenerated anchor at its first instance, and alias nodes to that anchor at later references.