Merge branch 'add_url_scan_limit_note_to_dast_docs_255232' into 'master'

Add note explaining the DAST_PATHS size limit

See merge request gitlab-org/gitlab!43643

doc/user/application_security/dast/index.md

@@ -438,7 +438,9 @@ variables:
 ```
 
 NOTE: **Note:**
-`DAST_AUTH_EXCLUDE_URLS` are ignored when `DAST_PATHS` is set.
+
+- The `DAST_PATHS` environment variable has a limit of about 130kb. If you have a list or paths greater than this it is recommended creating multiple DAST jobs and split the paths over each.
+- The `DAST_AUTH_EXCLUDE_URLS` environment variable is ignored when `DAST_PATHS` is set.
 
 #### Full Scan