Fix typo in 2.0.0 upgrade guide

Author: jorrit

upgrade-guides/v2.0.0.md

@@ -158,7 +158,7 @@ You don't need to manually tear down the route leave hook in most cases. We auto
 ### History Mixin
 [See below](#navigating-inside-deeply-nested-components)
 
-## Programatic Navigation
+## Programmatic Navigation
 
 There were several ways to get a hold of the history object to navigate around (see above :P) 1.0. In 2.0, where you once had a `history`, you now have a `router` to navigate instead (only from context) with a better signature.