omnia-mcutool: Bump to 0.3-rc3

* The `--upgrade` option will now work even if MCU is in bootloader (for
  example if previous upgrade was aborted).

* On boards with GD32 MCUs, `omnia-mcutool` will now refuse to upgrade
  application firmware to version lower than 4.1 if bootloader version
  is `2.0` (the original for first batch of boards with GD32 MCUs)
  since these versions of application and bootloader are not compatible.

  If user already upgraded to such a combination, an upgrade of
  bootloader firmware is required.

  The `--upgrade` option will inform about this and will automatically
  upgrade bootloader firmware if the `--force` option is given.

  (Note that version 4.1 of the MCU firmware was will be released soon,
   once it is properly tested.)

* Various other improvements.

hardware/omnia/omnia-mcutool/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2016-2023 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+# Copyright (C) 2016-2024 CZ.NIC z.s.p.o. (http://www.nic.cz/)
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=omnia-mcutool
-PKG_VERSION:=0.2
+PKG_VERSION:=0.3-rc3
 PKG_RELEASE:=$(AUTORELEASE)
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://gitlab.nic.cz/turris/omnia-mcutool/-/archive/$(PKG_VERSION)/
-PKG_HASH:=e1b823dac9f908b86ce63e7f525a70fa40c004bcfee1c4766cfcf52dfd58382d
+PKG_HASH:=80bc6a01ab86d51ebfdbddf77d74eead999a9bf7dbd08ca1fd4e8e1910eaf192
 
 PKG_MAINTAINER:=CZ.NIC <[email protected]>
 PKG_LICENSE:=GPL-2.0-or-later