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 b82afafd22d8b08c9c8cf60ae2091980a4cfa9b7..ccb012657be7cba83bc39e656f9f748d8be1bac5 100644 (file)
--- a/src/bin/pg_upgrade/version.c
+++ b/src/bin/pg_upgrade/version.c
@@ -494,7 +494,7 @@ 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 "