revert resources plugin update

Author: rbri

pom.xml

@@ -36,7 +36,7 @@
         <compiler-plugin.version>3.14.1</compiler-plugin.version>
         <jar-plugin.version>3.5.0</jar-plugin.version>
         <release-plugin.version>3.3.1</release-plugin.version>
-        <resources-plugin.version>3.4.0</resources-plugin.version>
+        <resources-plugin.version>3.3.1</resources-plugin.version> <!--jdoc fails with newer versions-->
         <source-plugin.version>3.4.0</source-plugin.version>
         <javadoc-plugin.version>3.12.0</javadoc-plugin.version>
         <surefire-plugin.version>3.5.4</surefire-plugin.version>