deps: update sdl to version 2.30.9

[scribam]

Changelog:

• Fixed audio issues on Android 15
• Fixed rare audio distortion and crash when audio devices are changed on Windows
• Fixed the PS5 controller face buttons on Amazon Fire TV
• Fixed detecting the Steam Virtual Gamepad on macOS
• Added support for wired XBox controllers on macOS 15.0 Sequoia
• Added support for the Steam Virtual Gamepad on macOS Sequoia
• Fixed the Steam Virtual Gamepad from showing up when games aren't running under Steam
• Fixed flicker when entering/exiting fullscreen or moving the window between scaled and non-scaled displays under Wayland.
• Fixes for data addresses above 2gb on Emscripten
• Fixed horizontal mousewheel scale on Emscripten