Fix pyOpenSci basic checks

[adtzlr]

This PR closes #853 and is related to the basic checks for the pyOpenSci submission, see pyOpenSci/software-submission#212.

Related Tasks in other PR

• Add issue templates (like already done for discussions), see Update issue templates #855

Tasks

• Add instructions to install the development version in README.md and link it in CONTRIBUTING.md
• Fix links in CONTRIBUTING.md
• Also refer to discussions in CONTRIBUTING.md

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.55%. Comparing base (dd2d8bd) to head (1e75c4c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #854   +/-   ##
=======================================
  Coverage   97.55%   97.55%           
=======================================
  Files         149      149           
  Lines        5732     5732           
=======================================
  Hits         5592     5592           
  Misses        140      140           

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