docs(forms-guide): fixed grammar (#3064)

Author: greeflas

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

@@ -304,7 +304,7 @@ figure.image-display
 :marked
   Focus on the binding syntax: `[(ngModel)]="..."`.
 
-  If we ran the app right now and started typing in the *Name* input box,
+  If we run the app right now and started typing in the *Name* input box,
   adding and deleting characters, we'd see them appearing and disappearing
   from the interpolated text.
   At some point it might look like this.
@@ -342,7 +342,7 @@ figure.image-display
     - Each input element has a `name` property that is required by Angular Forms to register the control with the form.
 
 :marked
-  If we ran the app right now and changed every hero model property, the form might display like this:
+  If we run the app right now and changed every hero model property, the form might display like this:
 figure.image-display
   img(src="/resources/images/devguide/forms/ng-model-in-action-2.png" width="400px" alt="ngModel in super action")
 :marked