Updated readme.md file of 104-templates folder in Angular (#2301)

* Updated readme.md file of104-templates

[#1847 ](https://github.com/kamranahmedse/developer-roadmap/issues/1847) I made the required additions to this file and resolved the issue.

* Update content/roadmaps/104-angular/content/104-templates/readme.md

* Update content/roadmaps/104-angular/content/104-templates/readme.md

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

content/roadmaps/104-angular/content/104-templates/readme.md

@@ -1 +1,5 @@
-# Templates
+# Templates
+
+A template is a form of HTML that tells Angular how to render the component.
+
+<BadgeLink href="https://angular.io/guide/architecture-components" colorScheme="yellow" badgeText="Read">Introduction to Components and Templates</BadgeLink>