Doc anchors for COPY formats

Hi hackers,

An IRC conversation just now made me notice that it would be handy to
have stable links for the descrpitions of the various COPY formats, per
the attached patch.

- ilmari

From 5e59273370a39cd46627b89145a7c06dd6f00f7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dagfinn=20Ilmari=20Manns=C3=A5ker?= <ilmari@ilmari.org>
Date: Thu, 25 Apr 2024 12:09:14 +0100
Subject: [PATCH] Add anchors for COPY format descriptions

---
 doc/src/sgml/ref/copy.sgml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/src/sgml/ref/copy.sgml b/doc/src/sgml/ref/copy.sgml
index 1ce19668d8..6851293854 100644
--- a/doc/src/sgml/ref/copy.sgml
+++ b/doc/src/sgml/ref/copy.sgml
@@ -630,7 +630,7 @@
  <refsect1>
   <title>File Formats</title>
 
-  <refsect2>
+  <refsect2 id="sql-copy-text-format">
    <title>Text Format</title>
 
    <para>
@@ -770,7 +770,7 @@
    </para>
   </refsect2>
 
-  <refsect2>
+  <refsect2 id="sql-copy-csv-format">
    <title>CSV Format</title>
 
    <para>
@@ -855,7 +855,7 @@
 
   </refsect2>
 
-  <refsect2>
+  <refsect2 id="sql-copy-binary-format">
    <title>Binary Format</title>
 
    <para>
-- 
2.39.2