libcapsule v0.20251201.0
* Make the glibc fallback library path runtime-configurable
(steamrt/tasks#866, steam-runtime#704)
* Expand glibc fallback search path to cover most common OS variants,
most-specific first (steamrt/tasks#866, steam-runtime#704)
* Internal changes:
- Space out debugging messages a bit more
- Fix help formatting
- Make more use of automatic memory management
- CI fixes