Fix typo

Duplicate assignment in commit af4002b381 should have been a
different field.  (But it didn't affect the outcome.)

Reported-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/E1tngY6-0000UL-2n%40gemulon.postgresql.org

src/backend/access/hash/hash.c

@@ -66,7 +66,7 @@ hashhandler(PG_FUNCTION_ARGS)
 	amroutine->amcanorderbyop = false;
 	amroutine->amcanhash = true;
 	amroutine->amconsistentequality = true;
-	amroutine->amconsistentequality = false;
+	amroutine->amconsistentordering = false;
 	amroutine->amcanbackward = true;
 	amroutine->amcanunique = false;
 	amroutine->amcanmulticol = false;