Improve DAST introduction

doc/user/application_security/dast/browser_based.md

@@ -27,7 +27,7 @@ Scanning a web application with both the browser-based crawler and GitLab DAST s
 
 The browser-based crawler is an extension to the GitLab DAST product. DAST should be included in the CI/CD configuration and the browser-based crawler enabled using CI/CD variables:
 
-1. Install the DAST [prerequisites](index.md#prerequisite).
+1. Ensure the DAST [prerequisites](index.md#prerequisites) are met.
 1. Include the [DAST CI template](index.md#include-the-dast-template).
 1. Set the target website using the `DAST_WEBSITE` CI/CD variable.
 1. Set the CI/CD variable `DAST_BROWSER_SCAN` to `true`.