Bump gitflow-maven-plugin from 1.14.0 to 1.15.1

Bumps [gitflow-maven-plugin](https://github.com/aleksandr-m/gitflow-maven-plugin) from 1.14.0 to 1.15.1.
- [Release notes](https://github.com/aleksandr-m/gitflow-maven-plugin/releases)
- [Changelog](https://github.com/aleksandr-m/gitflow-maven-plugin/blob/master/CHANGELOG.md)
- [Commits](aleksandr-m/gitflow-maven-plugin@v1.14.0...v1.15.1)

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

Author: dependabot[bot]

pom.xml

@@ -335,7 +335,7 @@
         <plugin>
           <groupId>com.amashchenko.maven.plugin</groupId>
           <artifactId>gitflow-maven-plugin</artifactId>
-          <version>1.14.0</version>
+          <version>1.15.1</version>
           <configuration>
             <gitFlowConfig>
               <productionBranch>master</productionBranch>