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 8330d5656c7c4e588f5ff078642496b2c5a7751d..7c64ce8eee48e29eefad6b9c615539915f462ae1 100644 (file)
--- a/src/bin/pg_upgrade/version.c
+++ b/src/bin/pg_upgrade/version.c
@@ -463,7 +463,7 @@ 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 "