Removed dead sonar link
<item name="Logging Wiki" href="https://cwiki.apache.org/confluence/display/LOGGING/Log4j"/>
<item name="Apache" href="https://www.apache.org/"/>
<item name="Logging Services" href="https://logging.apache.org/"/>
- <item name="Sonar" href="https://analysis.apache.org/dashboard/index/org.apache.logging.log4j:log4j"/>
<item name="GitHub" href="https://github.com/apache/logging-log4j2"/>
</links>
