MINOR: Bump org.codehaus.mojo:versions-maven-plugin

Bumps [org.codehaus.mojo:versions-maven-plugin](https://github.com/mojohaus/versions) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/mojohaus/versions/releases)
- [Changelog](https://github.com/mojohaus/versions/blob/master/ReleaseNotes.md)
- [Commits](mojohaus/versions@2.20.0...2.21.0)

---
updated-dependencies:
- dependency-name: org.codehaus.mojo:versions-maven-plugin
  dependency-version: 2.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

bom/pom.xml

@@ -213,7 +213,7 @@ under the License.
         <plugin>
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>versions-maven-plugin</artifactId>
-          <version>2.20.0</version>
+          <version>2.21.0</version>
         </plugin>
       </plugins>
     </pluginManagement>

pom.xml

@@ -512,7 +512,7 @@ under the License.
         <plugin>
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>versions-maven-plugin</artifactId>
-          <version>2.20.0</version>
+          <version>2.21.0</version>
         </plugin>
         <plugin>
           <groupId>pl.project13.maven</groupId>