Fix angular resource typo (#3101)

* fixed typo in router outlets and added some content to router links

* syntax update

* Update content/roadmaps/104-angular/content/107-routing/102-router-links.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/104-angular/content/107-routing/101-router-outlets.md

@@ -5,4 +5,4 @@ The router-outlet is a directive that's available from the @angular/router packa
 Thanks to the router outlet, your app will have multiple views/pages and the app template acts like a shell of your application. Any element, you add to the shell will be rendered in each view, only the part marked by the router outlet will be changed between views.
 
 <ResourceGroupTitle>Free Content</ResourceGroupTitle>
-<BadgeLink colorScheme='blue' badgeText='Official Website' href='https://angular.io/api/router/RouterOutle'>Understanding Router Outlets</BadgeLink>
+<BadgeLink colorScheme='blue' badgeText='Official Website' href='https://angular.io/api/router/RouterOutlet'>Understanding Router Outlets</BadgeLink>

content/roadmaps/104-angular/content/107-routing/102-router-links.md

@@ -1 +1,7 @@
 # Router links
+
+In Angular, routerLink when applied to an element in a template, makes that element a link that initiates navigation to a route. Navigation opens one or more routed components in one or more <router-outlet> locations on the page.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='' href='https://angular.io/api/router/RouterLink'>Understanding Router Links</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.digitalocean.com/community/tutorials/angular-navigation-routerlink-navigate-navigatebyurl'>Angular Router: Navigation Using RouterLink, Navigate, or NavigateByUrl</BadgeLink>