Changed canonical_url to relative_url in schema description

Author: yogeshsuhagiya

app/code/Magento/UrlRewriteGraphQl/etc/schema.graphqls

@@ -5,7 +5,7 @@ type Query {
     urlResolver(url: String!): EntityUrl @resolver(class: "Magento\\UrlRewriteGraphQl\\Model\\Resolver\\EntityUrl") @doc(description: "The urlResolver query returns the relative URL for a specified product, category or CMS page")
 }
 
-type EntityUrl @doc(description: "EntityUrl is an output object containing the `id`, `canonical_url`, and `type` attributes") {
+type EntityUrl @doc(description: "EntityUrl is an output object containing the `id`, `relative_url`, and `type` attributes") {
     id: Int @doc(description: "The ID assigned to the object associated with the specified url. This could be a product ID, category ID, or page ID.")
     relative_url: String @doc(description: "The internal relative URL. If the specified  url is a redirect, the query returns the redirected URL, not the original.")
     type: UrlRewriteEntityTypeEnum @doc(description: "One of PRODUCT, CATEGORY, or CMS_PAGE.")