Adding note on DAST security reports

doc/user/application_security/dast/index.md

@@ -31,6 +31,10 @@ that is provided by [Auto DevOps](../../../topics/autodevops/index.md).
 GitLab checks the DAST report, compares the found vulnerabilities between the source and target
 branches, and shows the information right on the merge request.
 
+NOTE: **Note:**
+This comparison logic uses only the latest pipeline executed for the target branch's base commit.
+Running the pipeline on any other commit has no effect on the merge request.
+
 ![DAST Widget](img/dast_all.png)
 
 By clicking on one of the detected linked vulnerabilities, you will be able to