Update 01.Welcome.md

Author: TomHAnderson

resources/docs/pages/01.Introduction/01.Welcome.md

@@ -49,7 +49,7 @@ The [doctrine-orm-graphql](https://github.com/api-skeletons/doctrine-orm-graphql
 creates the types for your Doctrine entities and has numerous other features.
 
 A [Skipper](https://skipper18.com) diagram is included and the example database metadata
-is exported from it as XML.  Tha advantages of XML metadata over annotations or attributes
+is exported from it as XML.  The advantages of XML metadata over annotations or attributes
 are many and not needing to edit the XML manually is a big benefit.