Bump flatten-maven-plugin from 1.4.0 to 1.4.1

Bumps [flatten-maven-plugin](https://github.com/mojohaus/flatten-maven-plugin) from 1.4.0 to 1.4.1.
- [Release notes](https://github.com/mojohaus/flatten-maven-plugin/releases)
- [Commits](mojohaus/flatten-maven-plugin@1.4.0...1.4.1)

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

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

pom.xml

@@ -26,7 +26,7 @@
     <docker.image>${project.artifactId}</docker.image>
     <error-prone.version>2.18.0</error-prone.version>
     <extra-enforcer-rules.version>1.6.1</extra-enforcer-rules.version>
-    <flatten-maven-plugin.version>1.4.0</flatten-maven-plugin.version>
+    <flatten-maven-plugin.version>1.4.1</flatten-maven-plugin.version>
     <fmt-maven-plugin.version>2.13</fmt-maven-plugin.version>
     <guava.version>31.1-jre</guava.version>
     <jacoco-maven-plugin.version>0.8.8</jacoco-maven-plugin.version>