Upgrade to nexus-staging-plugin 1.6.5

Release notes:

https://github.com/sonatype/nexus-maven-plugins/releases

pom.xml

@@ -237,7 +237,7 @@
       <plugin>
         <groupId>org.sonatype.plugins</groupId>
         <artifactId>nexus-staging-maven-plugin</artifactId>
-        <version>1.6.3</version>
+        <version>1.6.5</version>
         <extensions>true</extensions>
         <configuration>
           <serverId>ossrh</serverId>