HBX-3257: Update flatten-maven-plugin dependency to version 1.7.3

Signed-off-by: Koen Aers <[email protected]>

Author: koentsje

pom.xml

@@ -126,7 +126,7 @@
         <maven-plugin-api.version>3.9.11</maven-plugin-api.version>
         <maven-plugin-annotations.version>3.15.2</maven-plugin-annotations.version>
         <maven-wrapper-plugin.version>3.3.4</maven-wrapper-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-invoker-plugin.version>3.9.1</maven-invoker-plugin.version>
         <github-site-maven-plugin.version>0.12</github-site-maven-plugin.version>
         <maven-project-info-reports-plugin.version>3.9.0</maven-project-info-reports-plugin.version>