Docs: fix condition in pivotal .ditaval
<prop att="otherprops" val="op-help" action="include"/>
<prop att="otherprops" val="op-hidden" action="exclude"/>
<prop att="otherprops" val="op-print" action="exclude"/>
- <prop att="otherprops" val="pivotal" action="exclude"/>
+ <prop att="otherprops" val="pivotal" action="include"/>
<prop att="otherprops" val="oss-only" action="exclude"/>
<prop att="otherprops" val="gpdb" action="include"/>
</val>
