chore(deps): update peaceiris/actions-mdbook action to v2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
peaceiris/actions-mdbook	action	major	v1 -> v2

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Release Notes

peaceiris/actions-mdbook (peaceiris/actions-mdbook)

v2

Compare Source

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Configuration

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.50%. Comparing base (1d18d4a) to head (645e9fe).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #150   +/-   ##
=======================================
  Coverage   74.50%   74.50%           
=======================================
  Files          37       37           
  Lines         957      957           
=======================================
  Hits          713      713           
  Misses        244      244           

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