build(deps): Bump org.codehaus.mojo:flatten-maven-plugin

Bumps [org.codehaus.mojo:flatten-maven-plugin](https://github.com/mojohaus/flatten-maven-plugin) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/mojohaus/flatten-maven-plugin/releases)
- [Commits](mojohaus/flatten-maven-plugin@1.5.0...1.6.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

org.eclipse.transformer.parent/pom.xml

@@ -249,7 +249,7 @@ SPDX-License-Identifier: ${project.licenses[0].name}
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>flatten-maven-plugin</artifactId>
-					<version>1.5.0</version>
+					<version>1.6.0</version>
 					<configuration>
 						<flattenMode>oss</flattenMode>
 					</configuration>