build(deps): bump download-maven-plugin from 1.6.8 to 1.7.0 (#3305)

Bumps [download-maven-plugin](https://github.com/maven-download-plugin/maven-download-plugin) from 1.6.8 to 1.7.0.
- [Release notes](https://github.com/maven-download-plugin/maven-download-plugin/releases)
- [Commits](download-maven-plugin/download-maven-plugin@1.6.8...1.7.0)

---
updated-dependencies:
- dependency-name: com.googlecode.maven-download-plugin:download-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Eric Wittmann <eric.wittmann@gmail.com>

Author: dependabot[bot]

system-tests/pom.xml

@@ -229,7 +229,7 @@
             <plugin>
                 <groupId>com.googlecode.maven-download-plugin</groupId>
                 <artifactId>download-maven-plugin</artifactId>
-                <version>1.6.8</version>
+                <version>1.7.0</version>
                 <executions>
                     <execution>
                     <!-- Needs to run before java-generator-maven-plugin -->