Fix docs typo for alias relationships

docs/tutorial/relationship-attributes/aliased-relationships.md

@@ -21,7 +21,7 @@ JOIN address AS work_address_alias
 The aliases we create are `home_address_alias` and `work_address_alias`.  You can think of them
 as a view to the same underlying `address` table.
 
-We can this with **SQLModel** and **SQLAlchemy** using `sqlalchemy.orm.aliased`
+We can do this with **SQLModel** and **SQLAlchemy** using `sqlalchemy.orm.aliased`
 and a couple of extra bits of info in our **SQLModel** relationship definition and join statements.
 
 ## The Relationships