doc: Fix DocBook table column count declaration

This was broken in 26cd1d7d9513b2b490efc746551ec5a786b56212.

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 0c8fc67cc62fed86433ad3cc15b8f41fd54054bd..3a83ab2216ce6629b33e97fff9d1a042787338f1 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -10092,7 +10092,7 @@ table2-mapping
 
   <table id="functions-json-op-table">
      <title><type>json</> and <type>jsonb</> Operators</title>
-     <tgroup cols="4">
+     <tgroup cols="5">
       <thead>
        <row>
         <entry>Operator</entry>