Update hello-world.njk

Author: paulstevendev

packages/tel-frontend/src/tel/components/hello-world/hello-world.njk

@@ -1,6 +1,6 @@
-{# tel-frontend-review/src/components/hello-world.njk #}
+{# packages/tel-frontend/src/tel/components/hello-world/hello-world.njk #}
 {% macro helloWorld(params = {}) %}
-  <div class="nhsuk-card {{ params.classes | default('') }}">
+  <div class="nhsuk-card hello-world {{ params.classes | default('') }}" data-module="hello-world">
     <div class="nhsuk-card__content">
       <h3 class="nhsuk-card__heading">{{ params.heading | default('Hello World Component') }}</h3>
       <p class="nhsuk-card__description">{{ params.text | default('This is just a test component for setting up the repo.') }}</p>