set properties encoding as per https://maven.apache.org/plugins/maven-resources-plugin/examples/filtering-properties-files.html

Author: TheSnoozer

pom.xml

@@ -41,6 +41,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <propertiesEncoding>UTF-8</propertiesEncoding>
         <project.build.outputTimestamp>10</project.build.outputTimestamp>
 
         <java.target>11</java.target>