Grant network access so update checks can reach GitHub (#1163)

packaging/linux/flatpak/ai.storyteller.soundcraft.bundle.yml

@@ -23,6 +23,8 @@ finish-args:
   - --socket=fallback-x11
   # X11 shared memory (MIT-SHM). Without it the X11 fallback is slow or fails.
   - --share=ipc
+  # Update checks reach GitHub (Help > Check for Updates and the startup check).
+  - --share=network
   # GPU access for the wgpu UI (Vulkan, or GL as a fallback).
   - --device=dri
   # Playback and recording. cpal talks to ALSA; the runtime's alsa-lib routes ALSA through its

packaging/linux/flatpak/ai.storyteller.soundcraft.yml

@@ -28,6 +28,8 @@ finish-args:
   - --socket=fallback-x11
   # X11 shared memory (MIT-SHM). Without it the X11 fallback is slow or fails.
   - --share=ipc
+  # Update checks reach GitHub (Help > Check for Updates and the startup check).
+  - --share=network
   # GPU access for the wgpu UI (Vulkan, or GL as a fallback).
   - --device=dri
   # Playback and recording. cpal talks to ALSA; the runtime's alsa-lib routes ALSA through its