Convert another SGML ID to lower case

petere · petere · commit 7c981590c2e8 · 2017-10-21T12:25:31.000-04:00
The mostly automated conversion in 1ff01b3 missed this one because of the unusual whitespace.
diff --git a/doc/src/sgml/release-9.0.sgml b/doc/src/sgml/release-9.0.sgml
@@ -7853,7 +7853,7 @@
 
     <listitem>
      <para>
-      <link linkend="SQL-EXPLAIN "><command>EXPLAIN</command></link> enhancements.
+      <link linkend="sql-explain"><command>EXPLAIN</command></link> enhancements.
       The output is now available in JSON, XML, or YAML format, and includes
       buffer utilization and other data not previously available.
      </para>
