learning path: update learning path for v7.4#15006

Merged

ti-chi-bot[bot] merged 2 commits intopingcap:release-7.4from hfxsd:update-learning-path-for-v7.4

Oct 11, 2023

+42-43

Commits on Oct 10, 2023

Update _index.md
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Update _index.md

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