sdl2: Update to version 2.28.3

sdl2: Update to version 2.28.3

- Update from version 2.28.1 to 2.28.3
- Update of rootfile
- Changelog
    2.28.3
       This is a stable bugfix release, with the following changes:
	    Added a gamepad mapping for the G-Shark GS-GP702
	    Fixed touchpad events for the Razer Wolverine V2 Pro in PS5 mode
	    Fixed getting key events from TV remotes on Android
	    Updated to Android minSdkVersion 19 and targetSdkVersion 34 to meet Google
	     Play Store requirements
    2.28.2
       This is a stable bugfix release, with the following changes:
	    Fixed occasionally failing to open the clipboard on Windows
	    Fixed crash at shutdown when using the D3D11 renderer
	    Fixed setting the viewport when using the D3D12 renderer
	    Fixed crash using SDL event functions before initializing SDL on Windows
	    Fixed Xbox controller trigger motion events on Windows
	    Fixed Xbox controller rumble in the background on Windows
	    Added the hint SDL_HINT_JOYSTICK_WGI to control whether to use
	     Windows.Gaming.Input for controllers
	    Fixed 8BitDo gamepad mapping when in XInput mode on Linux
	    Fixed controller lockup initializing some unofficial PS4 replica controllers
	    Fixed video initialization on headless Linux systems using VNC
	    Fixed large mouse jump when changing relative mouse mode on macOS
	    Fixed hardware keyboard text input on iPadOS

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>