updated maven-plugin-plugin to 3.5.1
diff --git a/pom.xml b/pom.xml
index f6dd3cc..dd847c2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -856,7 +856,7 @@
     <sonar.host.url>https://analysis.apache.org/</sonar.host.url>
     <maven.site.cache>${user.home}/maven-sites</maven.site.cache>
     <maven.site.path>../..</maven.site.path><!-- to be overridden -->
-    <mavenPluginToolsVersion>3.5</mavenPluginToolsVersion>
+    <mavenPluginToolsVersion>3.5.1</mavenPluginToolsVersion>
     <!-- don't fail check for some rules that are too hard to enforce (could even be told broken for some) -->
     <checkstyle.violation.ignore>RedundantThrows,NewlineAtEndOfFile,ParameterNumber,MethodLength,FileLength</checkstyle.violation.ignore>
   </properties>