Update version number to 7.2.1

Merged-by: Martin Grzenia <martin.grzenia@iml.fraunhofer.de>

Author: swltr

gradle/common.gradle

@@ -21,7 +21,7 @@ else if (System.env.CI_PIPELINE_IID) {
 // - The minor version number should be incremented when new feature were added.
 // - The patch level should be incremented with every small change to the code
 //   (e.g. bugfixes).
-project.version = "7.2.0"
+project.version = "7.2.1"
 if (!(project.hasProperty("NO_BUILD_NUMBER")
     && Boolean.valueOf(project.getProperties().get("NO_BUILD_NUMBER")))) {
   project.version += "-$versionBuild"