Doc: fix mention of psql's minimum supported server version.

Commit cf0cab868 removed describe.c's support for pre-9.2 server
versions, but neglected to update this documentation reference.

Discussion: https://postgr.es/m/GV0P278MB041917EB3E2FE8704B5AE2C6D2DC9@GV0P278MB0419.CHEP278.PROD.OUTLOOK.COM

diff --git a/doc/src/sgml/ref/psql-ref.sgml b/doc/src/sgml/ref/psql-ref.sgml
index 5fc6b1034aeb08ff454c0aab227411bf017bc89f..47bf3342a59d2505acedf56302d5bca0938490e4 100644 (file)
--- a/doc/src/sgml/ref/psql-ref.sgml
+++ b/doc/src/sgml/ref/psql-ref.sgml
@@ -4914,7 +4914,7 @@ PSQL_EDITOR_LINENUMBER_ARG='--line '
        or an older major version.  Backslash commands are particularly likely
        to fail if the server is of a newer version than psql
        itself.  However, backslash commands of the \d family should
-       work with servers of versions back to 7.4, though not necessarily with
+       work with servers of versions back to 9.2, though not necessarily with
        servers newer than psql itself.  The general
        functionality of running SQL commands and displaying query results
        should also work with servers of a newer major version, but this cannot