DOC: Fix linked markdown documents

[abyesilyurt]

Internal markdown links in docs did not work due to a bug in myst-parser. We can use an older version of myst-parser until the bug is fixed.

Example: On page: https://pypdf.readthedocs.io/en/stable/dev/intro.html, link to "See testing pypdf with pytest"

Related issue: executablebooks/MyST-Parser#658

[codecov]

Codecov Report

Base: 91.83% // Head: 91.83% // No change to project coverage 👍

Coverage data is based on head (f9689fa) compared to base (00f1d34).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1537   +/-   ##
=======================================
  Coverage   91.83%   91.83%           
=======================================
  Files          33       33           
  Lines        6073     6073           
  Branches     1193     1193           
=======================================
  Hits         5577     5577           
  Misses        321      321           
  Partials      175      175           

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[MartinThoma]

Thank you for the catch!

However, the way you pinned it is not good. Within the pyproject.toml, only restrictions that are strictly necessary should be done. Otherwise, people might get conflicting dependencies.

Instead of the change in pyproject.toml, please adjust those two:

• https://github.com/py-pdf/pypdf/blob/main/requirements/docs.in#L3
• https://github.com/py-pdf/pypdf/blob/main/requirements/docs.txt#L5 <--- only the myst line should change; you could adjust that manually

[abyesilyurt]

Mentioned files are adjusted now.

[MartinThoma]

Thank you 🤗