docs(reactive-forms): fix typo (#3509)

Author: mrnickel

public/docs/ts/latest/guide/reactive-forms.jade

@@ -478,7 +478,7 @@ figure.image-display
   and a checkbox for the `sidekick`. 
 
   You must bind the option's value property with `[value]="state"`. 
-  If you do not bind the value, the select shows the first option form the data model.
+  If you do not bind the value, the select shows the first option from the data model.
 
   The component _class_ defines control properties without regard for their representation in the template.
   You define the `state`, `power`, and `sidekick` controls the same way you defined the `name` control.