refs: show --no-reflog in the help text

We forgot that we must keep the documentation and help text in sync.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/refs.c

diff --git a/builtin/refs.c b/builtin/refs.c
index c459507..44d592a 100644
--- a/builtin/refs.c
+++ b/builtin/refs.c
@@ -8,7 +8,7 @@
 #include "worktree.h"
 
 #define REFS_MIGRATE_USAGE \
-	N_("git refs migrate --ref-format=<format> [--dry-run]")
+	N_("git refs migrate --ref-format=<format> [--no-reflog] [--dry-run]")
 
 #define REFS_VERIFY_USAGE \
 	N_("git refs verify [--strict] [--verbose]")