Bump org.codehaus.mojo:exec-maven-plugin from 3.1.0 to 3.1.1

Bumps [org.codehaus.mojo:exec-maven-plugin](https://github.com/mojohaus/exec-maven-plugin) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/mojohaus/exec-maven-plugin/releases)
- [Commits](mojohaus/exec-maven-plugin@exec-maven-plugin-3.1.0...3.1.1)

---
updated-dependencies:
- dependency-name: org.codehaus.mojo:exec-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

sdmx-dl-cli/pom.xml

@@ -240,7 +240,7 @@
                 <!-- Generates data files for documentation -->
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>
-                <version>3.1.0</version>
+                <version>3.1.1</version>
                 <executions>
                     <execution>
                         <id>generate-csv-sources</id>