Adding link to "schema page"

It was quite akward that the name of a page was not a link to the page

Author: Arthur-Milchior

src/content/learn/Learn-Queries.md

@@ -212,11 +212,11 @@ Now, in our client code, we can simply pass a different variable rather than nee
 
 The variable definitions are the part that looks like `($episode: Episode)` in the query above. It works just like the argument definitions for a function in a typed language. It lists all of the variables, prefixed by `$`, followed by their type, in this case `Episode`.
 
-All declared variables must be either scalars, enums, or input object types. So if you want to pass a complex object into a field, you need to know what input type that matches on the server. Learn more about input object types on the Schema page.
+All declared variables must be either scalars, enums, or input object types. So if you want to pass a complex object into a field, you need to know what input type that matches on the server. Learn more about input object types on the [Schema page](/learn/schema).
 
 Variable definitions can be optional or required. In the case above, since there isn't an `!` next to the `Episode` type, it's optional. But if the field you are passing the variable into requires a non-null argument, then the variable has to be required as well.
 
-To learn more about the syntax for these variable definitions, it's useful to learn the GraphQL schema language. The schema language is explained in detail on the Schema page.
+To learn more about the syntax for these variable definitions, it's useful to learn the GraphQL schema language. The schema language is explained in detail on the [Schema page](/learn/schema).
 
 
 ### Default variables
@@ -284,7 +284,7 @@ mutation CreateReviewForEpisode($ep: Episode!, $review: ReviewInput!) {
 
 Note how `createReview` field returns the `stars` and `commentary` fields of the newly created review. This is especially useful when mutating existing data, for example, when incrementing a field, since we can mutate and query the new value of the field with one request.
 
-You might also notice that, in this example, the `review` variable we passed in is not a scalar. It's an _input object type_, a special kind of object type that can be passed in as an argument. Learn more about input types on the Schema page.
+You might also notice that, in this example, the `review` variable we passed in is not a scalar. It's an _input object type_, a special kind of object type that can be passed in as an argument. Learn more about input types on the [Schema page](/learn/schema).
 
 ### Multiple fields in mutations