v0.2.3
[doc] add CVPR tutorial (#2666)
[hotfix] fix CPUAdam kernel nullptr (#1410)
[checkpoint] add ColoOptimizer checkpointing (#1316)
[doc] updated kernel-related optimisers' docstring (#2385)
[Gemini] add GeminiAdamOptimizer (#1960)
[hotfix] adapt ProcessGroup and Optimizer to ColoTensor (#1388)
Fixed docstring in colossalai (#171)
[nvme] CPUAdam and HybridAdam support NVMe offload (#1360)
[zero] add zero wrappers (#2523)