build(deps): Bump flatten-maven-plugin from 1.2.2 to 1.2.7

Bumps [flatten-maven-plugin](https://github.com/mojohaus/flatten-maven-plugin) from 1.2.2 to 1.2.7.
- [Release notes](https://github.com/mojohaus/flatten-maven-plugin/releases)
- [Commits](mojohaus/flatten-maven-plugin@1.2.2...flatten-maven-plugin-1.2.7)

---
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

@@ -70,7 +70,7 @@
     <nexus.snapshot.repository>https://app.camunda.com/nexus/content/repositories/zeebe-io-snapshots</nexus.snapshot.repository>
     <nexus.snapshot.repository.id>camunda-nexus</nexus.snapshot.repository.id>
 
-    <plugin.version.flatten>1.2.2</plugin.version.flatten>
+    <plugin.version.flatten>1.2.7</plugin.version.flatten>
     <plugin.version.fmt>2.9.1</plugin.version.fmt>
     <plugin.version.googlejavaformat>1.12.0</plugin.version.googlejavaformat>
     <plugin.version.jacoco>0.8.7</plugin.version.jacoco>