C comment: correct heading of extension query

Reported-by: Justin Pryzby
Discussion: https://postgr.es/m/20210803161345.GZ12533@telsasoft.com

Backpatch-through: 9.6

diff --git a/src/bin/pg_upgrade/version.c b/src/bin/pg_upgrade/version.c
index ffdafb8c0973c850eb4f5c6f93e353024c74a043..81eadce78e6e68abba8013694b966fd0c2e9ce58 100644 (file)
--- a/src/bin/pg_upgrade/version.c
+++ b/src/bin/pg_upgrade/version.c
@@ -315,7 +315,7 @@ report_extension_updates(ClusterInfo *cluster)
                DbInfo     *active_db = &cluster->dbarr.dbs[dbnum];
                PGconn     *conn = connectToServer(cluster, active_db->db_name);
 
-               /* find hash indexes */
+               /* find extensions needing updates */
                res = executeQueryOrDie(conn,
                                                                "SELECT name "
                                                                "FROM pg_available_extensions "