fix: update spelling mistake of variable

Author: jainpawan21

docs/docs/platform/templates.md

@@ -142,6 +142,6 @@ await novu.trigger('<REPLACE_WITH_EVENT_NAME_FROM_ADMIN_PANEL>', {
 ## FAQ
 
 <details>
- <summary>How to send dynamic HTML content as value of varibale?</summary>
+ <summary>How to send dynamic HTML content as value of variable?</summary>
  Use triple curly braces variable like <code>&#123;&#123;&#123;htmlVariable&#125;&#125;&#125;</code> .
 </details>