[Eigen_I] Translation Update (#153)

* try1

* eigen_I: Translation Update

* Update markov_chains_II.md

Modify unintentional changes in markov_chains_II.md

* update lecture

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Co-authored-by: Humphrey Yang <39026988+HumphreyYang@users.noreply.github.com>
Co-authored-by: Humphrey Yang <u6474961@anu.edu.au>

Author: Yiounah