experimental: markdown lint in CI

[fredbi]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (470ae20) to head (acd15f4).

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #61   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         6           
  Lines          606       606           
=========================================
  Hits           606       606           

Flag	Coverage Δ
oldstable-macos-latest	100.00% <ø> (ø)
oldstable-ubuntu-latest	100.00% <ø> (ø)
oldstable-windows-latest	100.00% <ø> (ø)
stable-macos-latest	100.00% <ø> (ø)
stable-ubuntu-latest	100.00% <ø> (ø)
stable-windows-latest	100.00% <ø> (ø)

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