format link consistency for Legacy Sites links in left-side nav menu
<menu name="Legacy Sites" inherit="top" img="img/glyphicons/link.png">
<item name="Log4j 1.2 - End of Life" href="http://logging.apache.org/log4j/1.2/"/>
<item name="Log4j 2.3.1 - Java 6" href="http://logging.apache.org/log4j/log4j-2.3.1/"/>
- <item name="Log4j 2.12.3 - Java 7" href="http://logging.apache.org/log4j/log4j-2.12.3"/>
+ <item name="Log4j 2.12.3 - Java 7" href="http://logging.apache.org/log4j/log4j-2.12.3/"/>
</menu>
<menu name="Components" inherit="top" img="img/glyphicons/cog.png">
