Update documentation for DS MAVEN_CLI_OPTS

changelogs/unreleased/37963-document-var-default.yml

+---
+title: Document MAVEN_CLI_OPTS defaults for maven project dependency scanning and update when the variable is used
+merge_request: 22126
+author:
+type: added

doc/user/application_security/dependency_scanning/index.md

@@ -146,7 +146,7 @@ using environment variables.
 | `PIP_INDEX_URL`                         | Base URL of Python Package Index (default `https://pypi.org/simple`). |
 | `PIP_EXTRA_INDEX_URL`                   | Array of [extra URLs](https://pip.pypa.io/en/stable/reference/pip_install/#cmdoption-extra-index-url) of package indexes to use in addition to `PIP_INDEX_URL`. Comma separated. |
 | `PIP_REQUIREMENTS_FILE`                 | Pip requirements file to be scanned. |
-| `MAVEN_CLI_OPTS`                        | List of command line arguments that will be passed to the maven analyzer during the project's build phase (see example for [using private repos](#using-private-maven-repos)). |
+| `MAVEN_CLI_OPTS`                        | List of command line arguments that will be passed to `maven` by the analyzer. The default is `"-DskipTests --batch-mode"`. See an example for [using private repos](#using-private-maven-repos). |
 | `BUNDLER_AUDIT_UPDATE_DISABLED`         | Disable automatic updates for the `bundler-audit` analyzer (default: `"false"`). Useful if you're running Dependency Scanning in an offline, air-gapped environment.|
 
 ### Using private Maven repos