Update apps/site/pages/en/learn/typescript/introduction.md

Co-authored-by: Brian Muenzenmeyer <brian.muenzenmeyer@gmail.com>
Signed-off-by: Augustin Mauroy <augustin.mauroy@outlook.fr>

Author: AugustinMauroy

apps/site/pages/en/learn/typescript/introduction.md

@@ -10,7 +10,7 @@ authors: sbielenica, ovflowd, vaishnav-mk, AugustinMauroy
 
 **[TypeScript](https://www.typescriptlang.org)** is an open-source language maintained and developed by Microsoft. It's loved and used by a lot of software developers around the world.
 
-Basically, TypeScript add adds additional syntax to JavaScript to support a tighter integration with your editor. Catch errors early in your editor or in your CI/CD pipeline, and write more maintainable code.
+Basically, TypeScript adds additional syntax to JavaScript to support a tighter integration with your editor. Catch errors early in your editor or in your CI/CD pipeline, and write more maintainable code.
 
 We can talk about other TypeScript benefits later, let's see some examples now!