Update postman-testing.md

Author: sulaiman-equivator-dev

docs/automated-testing/e2e-testing/recipes/postman-testing.md

@@ -1,6 +1,6 @@
 # Postman Testing
 
-This purpose of this document is to provide guidance on how to use Newman in your CI/CD pipeline to run End-to-end (E2E) tests defined in Postman Collections while following security best practices.
+The purpose of this document is to provide guidance on how to use Newman in your CI/CD pipeline to run End-to-end (E2E) tests defined in Postman Collections while following security best practices.
 
 First, we'll introduce Postman and Newman and then outline several Postman testing use cases that answer why you may want to go beyond local testing with Postman Collections.