documentation: git-update-index: add --show-index-version to synopsis

In 606e088d5d (update-index: add --show-index-version, 2023-09-12), we
added the new '--show-index-version' option to 'git-update-index' and
documented it, but forgot to add it to the synopsis section.

Add '--show-index-version' to the synopsis of 'git-update-index'.

Signed-off-by: Dov Murik <dov.murik@linux.dev>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index 8c47890a6a89bd7c0dbb2e3d259961262e4db3f7..7128aed540581f37a8e06dec79ea720e3cfacd8c 100644 (file)
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -25,6 +25,7 @@ SYNOPSIS
             [--really-refresh] [--unresolve] [--again | -g]
             [--info-only] [--index-info]
             [-z] [--stdin] [--index-version <n>]
+            [--show-index-version]
             [--verbose]
             [--] [<file>...]