doc:  PG 13 relnotes:  update bool_plperl item
Reported-by: Daniel Gustafsson
Discussion:
Backpatch-through: master
@@ -2890,9 +2890,10 @@ Author: Tom Lane <tgl@sss.pgh.pa.us>
-->
<para>
- Add extension <application>bool_plperl</application> which transforms
- <acronym>SQL</acronym> booleans to/from PL/Perl booleans (Ivan
- Panchenko) WHERE IS THIS DOCUMENTED?
+ Add extension <link
+ linkend="plperl"><application>bool_plperl</application></link>
+ which transforms <acronym>SQL</acronym> booleans to/from PL/Perl
+ booleans (Ivan Panchenko)
</para>
</listitem>
