Fix typo in xml example

This was noticed by @deining in #428

Closes #428

examples/xml/xml.go

@@ -41,7 +41,7 @@ func main() {
 	// it explicitly.
 	fmt.Println(xml.Header + string(out))
 
-	// Use `Unmarhshal` to parse a stream of bytes with XML
+	// Use `Unmarshal` to parse a stream of bytes with XML
 	// into a data structure. If the XML is malformed or
 	// cannot be mapped onto Plant, a descriptive error
 	// will be returned.

examples/xml/xml.hash

@@ -1,2 +1,2 @@
-d5da1784f3aa0bbba452d21c70833621a62159f4
-RsNLhMBazeX
+4b9dfaf797591099f6fcb762241289b1662a9250
+OVq7kNMk0GR