Fix Maven encoding warning

Warning:  Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!

pom.xml

@@ -11,6 +11,8 @@
 		<tycho.version>4.0.4</tycho.version>
 		<maven.compiler.source>17</maven.compiler.source>
 		<maven.compiler.target>17</maven.compiler.target>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 	</properties>
 	<modules>
 		<module>core</module>