Add note explaining the DAST_PATHS size limit

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.
 
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