[hotfix] fix typo in hybrid parallel io

[Fridge003]

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[github-actions]

The code coverage for the changed files is 92%.

Click me to view the complete report

Name                                                        Stmts   Miss  Cover
-------------------------------------------------------------------------------
colossalai/booster/plugin/hybrid_parallel_plugin.py           210     14    93%
colossalai/checkpoint_io/__init__.py                            5      0   100%
colossalai/checkpoint_io/hybrid_parallel_checkpoint_io.py     336     32    90%
-------------------------------------------------------------------------------
TOTAL                                                         551     46    92%