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

Bumps [org.codehaus.mojo:flatten-maven-plugin](https://github.com/mojohaus/flatten-maven-plugin) from 1.4.1 to 1.7.3.
- [Release notes](https://github.com/mojohaus/flatten-maven-plugin/releases)
- [Commits](mojohaus/flatten-maven-plugin@1.4.1...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-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -49,7 +49,7 @@
     <maven-shade-plugin.version>3.4.1</maven-shade-plugin.version>
     <build-helper-maven-plugin.version>3.4.0</build-helper-maven-plugin.version>
     <extra-enforcer-rules.version>1.6.2</extra-enforcer-rules.version>
-    <flatten-maven-plugin.version>1.4.1</flatten-maven-plugin.version>
+    <flatten-maven-plugin.version>1.7.3</flatten-maven-plugin.version>
     <jacoco-maven-plugin.version>0.8.10</jacoco-maven-plugin.version>
     <junit-platform-maven-plugin.version>1.1.8</junit-platform-maven-plugin.version>
     <license-maven-plugin.version>4.1</license-maven-plugin.version>