build(deps): bump com.googlecode.maven-download-plugin:download-maven-plugin

Bumps [com.googlecode.maven-download-plugin:download-maven-plugin](https://github.com/maven-download-plugin/maven-download-plugin) from 1.6.8 to 1.7.1.
- [Release notes](https://github.com/maven-download-plugin/maven-download-plugin/releases)
- [Commits](download-maven-plugin/download-maven-plugin@1.6.8...1.7.1)

---
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] <[email protected]>

Author: dependabot[bot]

extensions/indexes/spatial/pom.xml

@@ -186,7 +186,7 @@
             <plugin>
                 <groupId>com.googlecode.maven-download-plugin</groupId>
                 <artifactId>download-maven-plugin</artifactId>
-                <version>1.6.8</version>
+                <version>1.7.1</version>
                 <executions>
                     <execution>
                         <id>os-mastermap-samples</id>