Bump org.codehaus.mojo:flatten-maven-plugin from 1.7.2 to 1.7.3 (#2685)

Bumps [org.codehaus.mojo:flatten-maven-plugin](https://github.com/mojohaus/flatten-maven-plugin) from 1.7.2 to 1.7.3.
- [Release notes](https://github.com/mojohaus/flatten-maven-plugin/releases)
- [Commits](https://github.com/mojohaus/flatten-maven-plugin/compare/1.7.2...1.7.3)

---
updated-dependencies:
- dependency-name: org.codehaus.mojo:flatten-maven-plugin
  dependency-version: 1.7.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -80,7 +80,7 @@
 
         <!-- Maven Plugin versions - START -->
         <maven.enforcer.plugin.version>3.6.1</maven.enforcer.plugin.version>
-        <flatten.maven.plugin.version>1.7.2</flatten.maven.plugin.version>
+        <flatten.maven.plugin.version>1.7.3</flatten.maven.plugin.version>
         <maven.site.plugin.version>3.21.0</maven.site.plugin.version>
 
         <maven.surefire.plugin.version>3.5.4</maven.surefire.plugin.version>