v0.3.1
[format] applied code formatting on changed files in pull request 2997 (#3008)
[hotfix] fix CPUAdam kernel nullptr (#1410)
[checkpoint] add ColoOptimizer checkpointing (#1316)
[nfc]fix typo colossalai/pipeline tensor nn (#3899)
[bf16] add bf16 support (#3882)
[doc] updated kernel-related optimisers' docstring (#2385)
[nfc] fix typo colossalai/nn (#3887)
Fixed docstring in colossalai (#171)