Bump baseline to the first release shipping mandatory core components (#21)

Author: NotMyFault

pom.xml

@@ -44,7 +44,7 @@ THE SOFTWARE.
     <properties>
         <changelist>999999-SNAPSHOT</changelist>
         <gitHubRepo>jenkinsci/design-library-plugin</gitHubRepo>
-        <jenkins.version>2.339</jenkins.version>
+        <jenkins.version>2.341</jenkins.version>
         <java.level>8</java.level>
     </properties>