doc: Fix incorrect UUID index entry in function documentation.

Previously, the UUID functions documentation defined the "UUID" index entry
to link to the UUID data type page, even though that entry already exists there.
Instead, the UUID functions page should define its own index entry linking
to itself.

This commit updates the UUID index entry in the UUID functions documentation
to point to the correct section, improving navigation and avoiding duplication.

Back-patch to all supported versions.

Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/f33e0493-5773-4296-87c5-7ce459054cfe@oss.nttdata.com
Backpatch-through: 13

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index b279be73e60b1e145cef192955de8d2e3dc2561a..b4c907601bb1eb75b23387d270f768abf5e15101 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -13240,7 +13240,7 @@ CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple
  <sect1 id="functions-uuid">
   <title>UUID Functions</title>
 
-  <indexterm zone="datatype-uuid">
+  <indexterm zone="functions-uuid">
    <primary>UUID</primary>
    <secondary>generating</secondary>
   </indexterm>