docs(docs-infra): first-app tutorial - step-14-http src-final correction (angular#60738)

Updated housing.service.ts > getHousingLocationById()
 - Added search parameter to fetch URL
 - Returns single object instead of array

PR Close angular#60738

Author: ryncdr

adev/src/content/tutorials/first-app/steps/14-http/README.md

@@ -169,6 +169,8 @@ The data source has been configured, the next step is to update your web app to
         HELPFUL: For this example, the code uses `fetch`. For more advanced use cases consider using `HttpClient` provided by Angular.
 
     1. Update the `getHousingLocationsById` function to make a call to the web server you configured.
+  
+       HELPFUL: Notice the `fetch` method has been updated to _query_ the data for location with a matching `id` property value. See [URL Search Parameter](https://developer.mozilla.org/en-US/docs/Web/API/URL/search) for more information.
 
         <docs-code header="" path="adev/src/content/tutorials/first-app/steps/14-http/src-final/app/housing.service.ts" visibleLines="[15,18]"/>
 

adev/src/content/tutorials/first-app/steps/14-http/src-final/app/housing.service.ts

@@ -13,8 +13,9 @@ export class HousingService {
   }
 
   async getHousingLocationById(id: number): Promise<HousingLocation | undefined> {
-    const data = await fetch(`${this.url}/${id}`);
-    return (await data.json()) ?? {};
+    const data = await fetch(`${this.url}?id=${id}`);
+    const locationJson = await data.json();
+    return locationJson[0] ?? {};
   }
 
   submitApplication(firstName: string, lastName: string, email: string) {