Fix DAST_ZAP_GENERATE_CONFIG env var doc issue

doc/user/application_security/dast/index.md

@@ -471,7 +471,7 @@ DAST can be [configured](#customizing-the-dast-settings) using environment varia
 | `DAST_INCLUDE_ALPHA_VULNERABILITIES` | no | Include alpha passive and active scan rules. Boolean. `true`, `True`, or `1` are considered as true value, otherwise false. Defaults to `false`. |
 | `DAST_USE_AJAX_SPIDER` | no | Use the AJAX spider in addition to the traditional spider, useful for crawling sites that require JavaScript. Boolean. `true`, `True`, or `1` are considered as true value, otherwise false. Defaults to `false`. |
 | `DAST_ZAP_CLI_OPTIONS` | no | ZAP Server command-line options. For example, `-Xmx3072m` would set the Java maximum memory allocation pool size. |
-| `DAST_ZAP_GENERATE_CONFIG` | no | Generate sample ZAP config file for use with `DAST_ZAP_CONFIG_FILE`. Boolean. `true`, `True`, or `1` are considered as true value, otherwise false. Defaults to `false`. |
+| `DAST_ZAP_GENERATE_CONFIG` | no | The file name of the generated sample ZAP config file for use with `DAST_ZAP_CONFIG_FILE`. |
 | `DAST_ZAP_CONFIG_FILE` | no | Name of config file used to determine thresholds of vulnerability rules. |
 | `DAST_ZAP_CONFIG_URL` | no | URL of config file used to determine thresholds of vulnerability rules. |