fix: Change Flatpak runtime to 23.08 for better compatibility

- Update runtime-version from 24.08 to 23.08
- 23.08 is more widely available and stable
- Should resolve SDK installation issues

Author: rhy

com.voice2text.app.yml

@@ -1,6 +1,6 @@
 app-id: com.voice2text.app
 runtime: org.freedesktop.Platform
-runtime-version: '24.08'
+runtime-version: '23.08'
 sdk: org.freedesktop.Sdk
 command: voice_app.py
 finish-args: