Update release notes

Author: rinokadijk

src/main/resources/META-INF/plugin.xml

@@ -12,6 +12,13 @@
     </description>
 
     <change-notes><![CDATA[
+        Version 0.3.9<br />
+        -------------<br />
+        <ul>
+            <li>FIXED IDEAPLUGIN-10 Plugin crashes because it cannot find java.util.concurrent.ConcurrentHashMap.keySet </li>
+        </ul>
+        <br />
+        <br />
         Version 0.3.7<br />
         -------------<br />
         <ul>
@@ -146,4 +153,4 @@
                 implementation="org.axonframework.intellij.ide.plugin.publisher.DefaultEventPublisherProvider"/>
         <handlerProvider implementation="org.axonframework.intellij.ide.plugin.handler.DefaultEventHandlerProvider"/>
     </extensions>
-</idea-plugin>
+</idea-plugin>