Cosmetic release note fix.

doc/src/sgml/release.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.485 2006/11/24 23:31:55 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.486 2006/11/25 07:03:57 neilc Exp $ -->
 <!--
 
 Typical markup:
@@ -416,7 +416,7 @@ links to the main documentation.
         <para>
          This also implies that data can no longer be shared between a PL/Perl
          function and a PL/PerlU function.
-         Some perl installations have not been compiled with the correct flags
+         Some Perl installations have not been compiled with the correct flags
          to allow multiple interpreters to exist within a single process.
          In this situation PL/Perl and PL/PerlU cannot both be used in a
          single backend. The solution is to get a Perl installation which