fix: update skills README dates and notebook fixes-cann-learning-hub-AtomGit

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已合并

fix: update skills README dates and notebook fixes #535

ink_polymer创建于 10 天前从ink_polymer/cann-learning-hub： master-skills-fix 合入到 cann/cann-learning-hub： master

fix: update skills README dates and notebook fixes #535

已合并

ink_polymer创建于 10 天前

从ink_polymer/cann-learning-hub master-skills-fix合入到cann/cann-learning-hub master