docs: fix typos in getting-started (angular#29665)

PR angular#27684 introduced a new getting-started guide and a few typos slipped through the review.

PR Close angular#29665

aio/content/getting-started/data.md

@@ -118,7 +118,7 @@ When the "Buy" button is clicked, you'll use the cart service to add the current
 
 ## Create the cart page
 
-At this point, user can put items in the cart by clicking "Buy", but they can't yet see their cart. 
+At this point, users can put items in the cart by clicking "Buy", but they can't yet see their cart. 
 
 We'll create the cart page in two steps: 
 
@@ -127,7 +127,7 @@ We'll create the cart page in two steps:
 
 ### Set up the component
 
- To create the cart page, you being by following the same steps you did to create the product details component and to set up routing for the new component.
+ To create the cart page, you begin by following the same steps you did to create the product details component and to set up routing for the new component.
 
 1. Generate a cart component, named `cart`. 
 

aio/content/getting-started/routing.md

@@ -48,7 +48,7 @@ The app is already set up to use the Angular router and to use routing to naviga
     To do: I see a comment line with ellipses between the closing of h3 and div. It's an interesting way to show that we've clipped out some code. Should we use this elsewhere? 
     -->
 
-      The RouterLink directive give the router control over the anchor element. In this case, the route (URL) contains one fixed segment (`/products`) and the final segment is variable, inserting the id property of the current product. For example, the URL for a product with an `id` of 1 will be similar to `https://getting-started-myfork.stackblitz.io.products/1`. 
+      The RouterLink directive gives the router control over the anchor element. In this case, the route (URL) contains one fixed segment (`/products`) and the final segment is variable, inserting the id property of the current product. For example, the URL for a product with an `id` of 1 will be similar to `https://getting-started-myfork.stackblitz.io.products/1`. 
 
 1. Test the router by clicking a product name. The app displays the product details component, which currently always says "product-details works!" (We'll fix this in the next section.)