Bump oqs-sys/liboqs from b3b0fbb to e6c650c

Bumps [oqs-sys/liboqs](https://github.com/Open-Quantum-Safe/liboqs) from `b3b0fbb` to `e6c650c`.
- [Release notes](https://github.com/Open-Quantum-Safe/liboqs/releases)
- [Commits](open-quantum-safe/liboqs@b3b0fbb...e6c650c)

---
updated-dependencies:
- dependency-name: oqs-sys/liboqs
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>