Bump lzbench version to 2.3 and update CHANGELOG

Add improvement/fix entries for changes since v2.2 (alias group
reorganization, FASTEST/SLOW aliases, CUDA disabled by default, BSC
big-block chunking, RISC-V build flags, platform fixes) and bump
PROGVERSION to 2.3.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Update lzbench to v2.1

Update lzbench to v2.0.1

change lizard version to 2.0

azure-pipelines.yml: Add a trigger for pull requests

update lzbench version to v1.8.1

Update README.md with a new results

Travis CI: create static builds for tests using qemu

Update NEWS