git-repack: use non-dashed update-server-info

Signed-off-by: NDan McGee <dpmcgee@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

git-repack.sh

@@ -181,5 +181,5 @@ fi
 
 case "$no_update_info" in
 t) : ;;
-*) git-update-server-info ;;
+*) git update-server-info ;;
 esac